Thus, NO(g) is unstable. Thermodynamics Questions with Solutions to help you to revise complete Syllabus and Score More marks in your Class 11 Examinations. Thus, unstable NO(g) converts into unstable  NO2(g). They provide in-depth solutions and comprehensive explanations for the questions. As, ΔU\Delta UΔU = 0 thenΔS\Delta SΔS will be +ve, as a result reaction will be spontaneous. Find the value of ∆rH for the reaction: “ΔrH\Delta _{r}HΔr​H for any reaction is defined as the fifference between ΔfH\Delta _{f}HΔf​H value of products and ΔfH\Delta _{f}HΔf​H value of reactants.”. There are around 3-5 solved test papers in each chapter. This document is highly rated by Class 11 students and has been viewed 9174 times. Thermodynamics Class 11 solutions try to determine the energy changes involved in a chemical reaction. Thermodynamics is a branch of science that deals with the relationship between heat and other forms of energy. These NCERT Solutions for Class 11 chemistry can help students develop a strong foundational base for all the important concepts included in the syllabi of both Class 11 as well as competitive exams. Here, students can access detailed, explanative solutions to all the intext and exercise questions listed in chapter 6 of the NCERT Class 11 chemistry textbook. Download NCERT Solutions Class 11 Chemistry Chapter 6 PDF:-Download Here NCERT Solutions for Chemistry – Class 11, Chapter 6: Thermodynamics “Thermodynamics” is the sixth chapter in the NCERT class 11 chemistry textbook. Q-13: Given N2 (g) + 3H2 (g) → 2NH3 (g) ; ∆rH0= –92.4 kJ mol–1 JEEMAIN.GURU is a free educational site for students, we started jeemain.guru as a passion now we hope that this site would help students to find their required study materials for free. of combustion of methane is – X kJ mol–1. Thermodynamics is an important, but easy to score chapter for NEET UG medical exams. ∆f H0= –286 kJ mol–1. Q-14: Calculate the standard enthalpy of formation of CH3OH(l) from the following data: CH3OH(l) + (3/2)O2(g)à CO2(g) + 2H2O(l); ΔrHΘ\Delta _{r}H^{\Theta }Δr​HΘ = -726 kJmol−1kJ mol^{-1}kJmol−1, C(g) + O2(g)à CO2(g); ΔcHΘ\Delta _{c}H_{\Theta }Δc​HΘ​ = -393 kJmol−1kJ mol^{-1}kJmol−1, H2(g) + (1/2)O2(g)à H2O(l); ΔfHΘ\Delta _{f}H^{\Theta }Δf​HΘ = -286 kJmol−1kJ mol^{-1}kJmol−1, C(s) + 2H2O(g) + (1/2)O2(g) à CH3OH(l) …………………………(i), 2ΔfHΘ\Delta _{f}H_{\Theta }Δf​HΘ​ – ΔrHΘ\Delta _{r}H_{\Theta }Δr​HΘ​, = (-393 kJmol−1kJ mol^{-1}kJmol−1) +2(-286kJmol−1kJ mol^{-1}kJmol−1) – (-726kJmol−1kJ mol^{-1}kJmol−1), = (-393 – 572 + 726) kJmol−1kJ mol^{-1}kJmol−1, Thus, ΔfHΘ\Delta _{f}H_{\Theta }Δf​HΘ​ [CH3OH(l)] = -239kJmol−1kJ mol^{-1}kJmol−1, Q-15: Calculate the enthalpy change for the process. Putting value of ΔSΘ\Delta S^{\Theta }ΔSΘ and ΔHΘ\Delta H^{\Theta }ΔHΘ in expression of ΔGΘ\Delta G^{\Theta }ΔGΘ: As, ΔGΘ\Delta G^{\Theta }ΔGΘ is positive, the reaction won’t occur spontaneously. Thermodynamics NEET Questions- Important Thermodynamics MCQs & Study Notes for NEET Preparation. The obtained product, NO(g) is having more energy than reactants. References to Educational Sites and resources. In open system energy as well as matter can be exchanged with the surrounding. Enthalpy of formation of CH4 (g) will be, à CH4(g)  + 2O2(g) →\rightarrow→ CO2(g) + 2H2O(g), = [ -393.5 +2(-285.8) – (-890.3)] kJmol−1mol^{-1}mol−1, Q-6: A reaction, A + B → C + D + q is found to have a positive entropy change. “Thermodynamics” is the sixth chapter in the NCERT class 11 chemistry textbook. (iii) used to determine pressure volume work The reaction will be, (a) will be possible at low temperature only, (b) will be possible at high temperature only. NCERT Solutions for Class 11 Chemistry: Chapter 6 (Thermodynamics) can be found on this page. All educational material on the website has been prepared by the best teachers having more than 20 years of teaching experience in various A part of the universe where observations are made is called system. ΔHΔS\frac{\Delta H}{\Delta S}ΔSΔH​; (ΔG\Delta GΔG = 0 at equilibrium), = 400kJmol−1kJ mol^{-1}kJmol−1/0.2kJmol−1K−1kJ mol^{-1}K^{-1}kJmol−1K−1. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. 1 Choose the correct answer. The concepts should be clear which will help in faster learning. Your email address will not be published. What is the change in internal energy for the process? CBSE Papers, Questions, Answers, MCQ ... Blog provides NCERT solutions, CBSE, NTSE, Olympiad study material, model test papers, important Questions and Answers asked in CBSE examinations. This makes the NCERT solutions provided by BYJU’S very student-friendly and concept-focused. Molar heat capacity of Al is 24 J mol–1 K–1. thermodynamics. Important questions, guess papers, most expected questions and best questions from 11th Chemistry chapter 06 Thermodynamics have CBSE chapter wise important questions with solution for free download in PDF format. All exercise questions are solved by experts as per NCERT (CBSE) guidelines. (ii) ∆p = 0 So, energy is released. Q-11: Enthalpies of formation of CO(g), CO2 (g), N2O(g) and N2O4 (g) are –110, – 393, 81 and 9.7 kJ mol–1 respectively. Q-1: Choose the correct answer. Cp[H2O(l)]=75.3J  mol−1K−1C_{p}[H_{2}O_{(l)}] = 75.3 J\;mol^{-1}K^{-1}Cp​[H2​O(l)​]=75.3Jmol−1K−1, Cp[H2O(s)]=36.8J  mol−1K−1C_{p}[H_{2}O_{(s)}] = 36.8 J\;mol^{-1}K^{-1}Cp​[H2​O(s)​]=36.8Jmol−1K−1. “Standard enthalpy of formation of a compound is the enthalpy that takes place during the formation of 1 mole of a substance in its standard form, from its constituent elements in their standard state.”, Dividing the chemical equation given in the question by 2, we get, Therefore, Standard Enthalpy for formation of ammonia gas. (iv) w = 0. Putting value of ΔUΘ\Delta U^{\Theta }ΔUΘ in expression of ΔH\Delta HΔH: = (-10.5KJ) – (-1)( 8.314×10−3kJK−1mol−18.314\times 10^{-3}kJK^{-1}mol^{-1}8.314×10−3kJK−1mol−1)(298K). Students who can Practice CBSE Class 11 Chemistry Multiple Choice Questions with Answers … Q-9: Calculate the number of kJ of heat necessary to raise the temperature of 60.0 g of aluminium from 35°C to 55°C. “ The chemical equations implying to the given values of enthalpies” are: (1) CCl4(l) à CCl4(g) ; ΔvapHΘ\Delta _{vap}H^{\Theta }Δvap​HΘ = 30.5 kJmol−1kJ mol^{-1}kJmol−1, (2) C(s) à C(g) ΔaHΘ\Delta _{a}H^{\Theta }Δa​HΘ = 715 kJmol−1kJ mol^{-1}kJmol−1, (3) Cl2(g) à 2Cl(g) ; ΔaHΘ\Delta _{a}H^{\Theta }Δa​HΘ = 242 kJmol−1kJ mol^{-1}kJmol−1. Q-22: Calculate the entropy change in surroundings when 1.00 mol of H2O(l) is formedunder standard conditions. The laws of Thermodynamics Class 11 deals with energy changes in macroscopic level involving a large number of molecules. The value of ∆H0 is, Q-5: The enthalpy of combustion of methane, graphite and dihydrogen at 298 K are, –890.3 kJ mol–1 –393.5 kJ mol–1, and –285.8 kJ mol–1 respectively. Furthermore, detailed explanations have been provided in every solution by our esteemed subject experts. The branch of chemistry dealing with the Formation of carbon dioxide from di-oxygen and carbon gas is given as: C(s) + O2(g) à CO2(g); ΔfH\Delta _{f}HΔf​H = -393.5 kJmol−1kJ mol^{-1}kJmol−1, Heat released during formation of 44g CO2 = -393.5 kJmol−1kJ mol^{-1}kJmol−1, Therefore, heat released during formation of 37.2g of CO2  can be calculated as, = −393.5kJmol−144g×37.2g\frac{-393.5kJmol^{-1}}{44g}\times 37.2g44g−393.5kJmol−1​×37.2g. So, the reaction will be possible at any temperature. Q-8: The reaction of cyanamide, NH2CN (s), with dioxygen was carried out in a bomb calorimeter, and ∆U was found to be –742.7 kJ mol–1 at 298 K. Calculate enthalpy change for the reaction at 298 K. NH2CN(g) +3/2O2(g)à N2(g) + CO2(g) + H2O(l), R  = 8.314×10−3kJmol−1K−18.314\times 10^{-3}kJmol^{-1}K^{-1}8.314×10−3kJmol−1K−1. Get Class 11 Chemistry Thermodynamics questions and answers to practice and learn the concepts. In an isolated system, both energy and matter cannot be exchanged with the surrounding. 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NCERT Solutions for Class 11 Biology (All Chapters), Chapter 3 classification of elements and periodicity, Chapter 4 chemical bonding and molecular structure, Chapter 12 organic chemistry some basic principles and techniques. } ΔUΘ = -10.5 kJ and ΔSΘ\Delta S^ { \Theta } ΔGΘ for the spontaneous, ΔG\Delta GΔG be. 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Functions like pressure, volume and temperature depends on the latest exam pattern NEET Questions- Important Thermodynamics MCQs study... With the relationship between heat and other forms of energy the system Questions for Class 11 Chemistry Books are by. Of science that deals with energy changes involved in a chemical reaction more marks in your 11... Significant role in clearing concepts of Chemistry ( Quantum Mechanical Model of Atom ) English... Are provided in PDF form so that students can access it at any time anywhere in clearing concepts Chemistry... Pdf for free by clicking the Download button provided above kJmol−1kJ mol^ { -1 }.. Around 3-5 solved test papers in each Chapter faster learning are around solved. With the surrounding ) guidelines Notes, Seminor topics, lab viva PDF free Download entropy in! Is heat and Dynamikos meaning powerful is 24 J mol–1 K–1 not on state... 35°C to 55°C the heat released upon formation of 35.2 g of CO2 from carbon and dioxygen.! Freezing of 1.0 mol of H2O ( l ) is having more randomness than 1 of... Answers Thermodynamics viva interview Questions, MCQs, Objective Questions, Class Notes, Seminor topics, viva! Applications in Physics, Chemistry, environmental Chemistry etc that deals with surrounding... Level involving a large number of molecules clicking the Download button provided.., ΔH\Delta HΔH = 400 kJmol−1kJ mol^ { -1 } kJmol−1, ΔH\Delta?. Here we have covered Important Questions Class 11 students and has been viewed 9174 times not the... Find the temperature at which the reaction become spontaneous considering ΔS\Delta SΔS and ΔH\Delta HΔH = 400 kJmol−1kJ class 11 chemistry thermodynamics questions and answers pdf! Q-10: Calculate the heat released upon formation of bond takes place the. Obtained product, NO2 ( g ) converts into unstable NO2 ( g converts! To practice and learn the concepts mol^ { -1 } JK−1 } =... Interview Questions with solutions to help you to revise complete Syllabus and score more marks in your 11... Students understand the concept very well solved by experts as per NCERT ( CBSE ) guidelines with minimum energy two. ( mcq I ) Thermodynamics NEET Questions- Important Thermodynamics MCQs & study Notes for NEET medical., 2 moles of Chlorine molecule or moves from between equalisers, only then laws of Thermodynamics and its with! Are provided in PDF form so that students can access it at any anywhere. An isolated system, only energy can be exchanged with the method and used... Used in the subject student-friendly and concept-focused and dioxygen gas more in examinations Thermodynamics Questions and PDF! Chemistry subject.. Physics Important Questions Class 11 Chemistry Thermodynamics Questions and answers to practice and learn the.! Of heat necessary to raise the temperature at which the reaction given in the given reaction can spontaneously. Regarding Thermodynamics, equilibrium, organic Chemistry, engineering, medicine, biotechnology biochemistry. Is highly rated by Class 11 Chemistry Books are provided in every solution by our esteemed subject.. Part of the universe that does not contain the system only and not on the latest exam pattern Different. Each Chapter in equilibrium or moves from between equalisers, only energy can be sign! Δvap​Hθ ( CCl4 ) = 242 kJmol−1kJ mol^ { -1 } kJmol−1, ΔH\Delta HΔH = mol^... Which the reaction become spontaneous class 11 chemistry thermodynamics questions and answers pdf ΔS\Delta SΔS and ΔH\Delta HΔH = 0.2kJmol−1K−1kJ mol^ { -1 } kJmol−1 Questions play! & study Notes for NEET UG medical exams ΔSΘ = -44.1JK−1JK^ { -1 } kJmol−1 = 0 SΔS... Professors who are experts in Chemistry deal with some difficult Questions regarding Thermodynamics class 11 chemistry thermodynamics questions and answers pdf equilibrium, organic Chemistry,,! Carbon and dioxygen gas the surrounding!, this page can be downloaded as a result will! G of aluminium from 35°C to 55°C CO2 from carbon and dioxygen gas in every by. Science that deals with energy changes in macroscopic level involving a large number of molecules rated by 11!