Thermodynamics NCERT Solutions Class 11 Chemistry CBSE Study Material free pdf download

The NCERT Solutions for Class 11 Chemistry Chapter 6 Thermodynamics contains a vast collection of questions to practise. By practising these questions of Chapter 5 Thermodynamics, students can strengthen their problem solving skills as well as reasoning skills; these skills can be used in further chapters and real-life problems. These questions of Chapter 5 Thermodynamics can also help students to build a strong foundation for the chapter.

Access NCERT Solutions for Class 11 Chemistry Chapter – Thermodynamics

Access Video Lecture for Class 11 Chemistry Chapter – Thermodynamics

Topics included in NCERT Solutions for Class 11 Chemistry Chapter – Thermodynamics

1. Thermodynamic Terms
   • The System and the Surroundings
   • Types of Thermodynamic Systems
   • State of the System
   • Internal Energy as a State Function
2. Applications
   • Work
   • Enthalpy, H
3. Measurement of ΔU and ΔH: Calorimetry
4. Enthalpy Change and Reaction Enthalpy
5. Enthalpies for Different Types of Reactions
6. Spontaneity
7. Gibbs Energy Change and Equilibrium

NCERT Problems of Chapter Thermodynamics

* Note :  The Solutions of below problems are above in the pdf file.

Q-1: Choose the correct answer. A thermodynamic state function is a quantity

(i) used to determine heat changes
(ii) whose value is independent of the path
(iii) used to determine pressure-volume work
(iv) whose value depends on temperature only

Q-2: For the process to occur under adiabatic conditions, the correct condition is:
(i) ∆T = 0   (ii) ∆p = 0
(iii) q = 0   (iv) w = 0

Q-3: The enthalpies of all elements in their standard states are:

(i) Unity   (ii) Zero

(iii) < 0     (iv) Different for every element

Q-4: ∆U⁰ of combustion of methane is – X kJ mol^–1. 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. Enthalpy of the formation of CH_4 (g) will be

(i) -74.8 kJ

(ii) -52.27 kJ

(iii) +74.8 kJ

(iv) +52 kJ

Q-6: A reaction, A + B → C + D + q, is found to have a positive entropy change. The reaction will be

(i) possible at high temperature

(ii) possible only at low temperature

(iii) not possible at any temperature

(iv) possible at any temperature

Q-7: In a process, 701 J of heat is absorbed by a system, and 394 J of work is done by the system. What is the change in internal energy for the process?

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 the enthalpy change for the reaction at 298 K.

NH₂CN_(g) + 3/2 O_2(g) → N_2(g) + CO_2(g) + H₂O_(l)

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 molar heat capacity of Al is 24 J mol^–1 K^–1.

Q-10: Calculate the enthalpy change on freezing of 1.0 mol of water at 10.0°C to the ice at –10.0°C. ∆_fusH = 6.03 kJ mol^–1 at 0°C.

Q-11 Enthalpy of combustion of carbon to CO₂ is –393.5 kJ mol^–1. Calculate the heat released upon the formation of 35.2 g of CO₂ from carbon and dioxygen gas.

Q-12: Enthalpies of formation of CO _(g), CO_{2 (g)}, N₂O _(g) and N₂O_4 (g) are –110, – 393, 81 and 9.7 kJ mol^–1, respectively. Find the value of ∆_rH for the reaction:

N₂O_4(g) + 3CO_(g) →  N₂O_(g) + 3 CO_2(g)

Q-13: Given N₂ (g) + 3H₂ (g) → 2NH₃ (g) ; ∆_rH⁰= –92.4 kJ mol^–1
What is the standard enthalpy of the formation of NH₃ gas?

Q-14: Calculate the standard enthalpy of formation of CH₃OH_(l) from the following data:

CH₃OH_(l) + 3/2 O_2(g) → CO_2(g) + 2H₂O_(l);

Q-15: Calculate the enthalpy change for the process

CCl_4(g) → C_(g) + 4Cl_(g) and determine the value of bond enthalpy for C-Cl in CCl_4(g).

Q-16: For an isolated system, ∆U = 0, what will be ∆S?

Q-17: For the reaction at 298K,

2A + B → C

At what temperature will the reaction become spontaneous considering to be constant over the temperature range?

Q-18: For the reaction

2Cl_(g) → Cl_2(g)

What are the signs of ΔS and ΔG ?

Q-19: For the reaction

2A_(g) + B_(g) → 2D_(g)

Calculate

2A_(g) + B_(g) → 2D_(g)

Q-20: The equilibrium constant for a reaction is 10. What will be the value of ∆G₀? R = 8.314 JK^–1 mol^–1, T = 300 K.

Q-21: Comment on the thermodynamic stability of NO(g), given,

(1/2)N_2(g) + (1/2)O_2(g) → NO_(g);

NO_(g) + (1/2)O_2(g) → NO_2(g);

Q-22: Calculate the entropy change in surroundings when 1.00 mol of H₂O(l) is formed under standard conditions. ∆_f H⁰= –286 kJ mol^–1. 

NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics PDF

The Chapter 6 Thermodynamics Chapter 6 Thermodynamics can be a bit confusing if students are not able to understand the concepts properly. For that purpose students need to start practising Chapter 6 Thermodynamics questions from the NCERT textbook. After practising those questions, students can prefer referring to the NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics PDF which is available in the ANAND CLASSES website.

Exercise Wise NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics

In the NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics, a plethora of exercises are given so that students can understand the concepts as well as can solve confusions then and there. By practising exercise wise questions, students can learn to approach different questions of Chapter 5 Thermodynamics in different and creative ways.

Formula wise NCERT Solutions for Class 11 Chemistry Chapter 5 Thermodynamics

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Frequently Asked Questions on NCERT Solutions for Class 11 Chemistry Chapter 5

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About ANAND CLASSES NCERT Solutions

The NCERT Solutions for Class 11 Chemistry Chapter 5 provided on this page contains all the intext and exercise questions listed in Chapter 5 of the NCERT Chemistry textbook for Class 11. It, therefore, covers many important questions that could be asked in the annual examinations.

Furthermore, detailed explanations are provided for every solution by the subject-matter experts at ANAND CLASSES. This makes the NCERT Solutions provided by ANAND CLASSES very student-friendly and concept-focused. These NCERT Solutions for Class 11 Chemistry can help students develop a strong foundational base for all the important concepts included in the CBSE syllabus of both Class 11 as well as competitive exams. Also, in cases where students face difficulty while going through the NCERT Class 11 Chemistry Solutions, the ANAND CLASSES support team is always available to clear their doubts.

To know more about the difference between system and surrounding, the difference between closed, open and isolated systems, internal energy, heat, work, the first law of thermodynamics, calculation of energy change, the correlation between ∆U and ∆H, Hess’s law, extensive and intensive properties, and ∆G, register with ANAND CLASSES now!.