Last Updated on April 20, 2025 by XAM CONTENT
Hello students, we are providing case study questions for class 11 Chemistry. Case study questions are the new question format that is introduced in CBSE board. The resources for case study questions are very less. So, to help students we have created chapterwise case study questions for class 11 Chemistry. In this article, you will find case study questions for cbse class 11 Chemistry chapter 5 Chemical Thermodynamics.
| Chapter | Chemical Thermodynamics |
| Type of Questions | Case Study Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 11 |
| Subject | Chemistry |
| Useful for | Class 11 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 11 Chemistry Chapterwise Case Study |
Case Study Questions on Chemical Thermodynamics
Case Study Question 1
Passage:
A student is performing a lab experiment to measure the enthalpy change $(\Delta \mathrm{H})$ for the combustion of ethanol:
$$
\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}(l)+3 \mathrm{O}_2(g) \rightarrow 2 \mathrm{CO}_2(g)+3 \mathrm{H}_2 \mathrm{O}(l) \quad ; \quad \Delta H=-1367 \mathrm{~kJ} / \mathrm{mol}
$$
The student burns 1 mole of ethanol in a calorimeter and observes the temperature change in water. She is asked to interpret the sign of $\Delta \mathrm{H}$ and calculate heat change for partial reactions.
Q1. What is the sign of ΔH for the combustion of ethanol?
(a) Positive, because it absorbs heat
(b) Negative, because it releases heat
(c) Zero, because no work is done
(d) Depends on temperature
Answer: (b) Negative, because it releases heat
Explanation: The negative ΔH indicates an exothermic reaction → heat is released.
Q2. What is the heat released when 0.5 mol of ethanol is combusted?
(a) –683.5 kJ
(b) +683.5 kJ
(c) –1367 kJ
(d) –2734 kJ
Answer: (a) –683.5 kJ
\begin{aligned}
&\text { Explanation: }\\
&\Delta H=-1367 \mathrm{~kJ} / \mathrm{mol} \Rightarrow 0.5 \mathrm{~mol} \Rightarrow-1367 \times 0.5=-683.5 \mathrm{~kJ}
\end{aligned}
Q3. What type of thermodynamic process is combustion of ethanol?
(a) Isothermal and endothermic
(b) Adiabatic and reversible
(c) Exothermic and irreversible
(d) Isobaric and endothermic
Answer: (c) Exothermic and irreversible
Explanation: Combustion is irreversible and exothermic (releases heat rapidly and spontaneously).
Case Study Question 2
Passage:
During an experiment, 500 J of heat is supplied to a system, and the system does 150 J of work on the surroundings. The teacher asks students to use the First Law of Thermodynamics, which states:
ΔU = q − w
where ΔU is the change in internal energy, q is heat absorbed, and w is work done by the system.
Q1. What is the change in internal energy (ΔU) for the process?
(a) 350 J
(b) –650 J
(c) 650 J
(d) 150 J
Answer: (a) 350 J
Q2. If the same system had work done on it instead, how would the equation change?
(a) ΔU = q + w
(b) ΔU = q – w
(c) ΔU = w – q
(d) ΔU = 0
Answer: (a) ΔU = q + w
Q3. In thermodynamics, which of the following is a state function?
(a) Work
(b) Heat
(c) Internal energy
(d) Path
Answer: (c) Internal energy
Explanation: Internal energy depends only on initial and final state, not path → it is a state function.
We hope the given case study questions for Chemical Thermodynamics Class 11 helps you in your learning.
Also check
- Chemical Thermodynamics Class 11 Case Study Questions Chemistry Chapter 5
- Chemical Bonding and Molecular Structure Class 11 Case Study Questions Chemistry Chapter 4
- Classification of Elements and Periodicity in Properties Class 11 Case Study Questions Chemistry Chapter 3
- Structure of Atom Class 11 Case Study Questions Chemistry Chapter 2
- Some Basic Concepts of Chemistry Class 11 Case Study Questions Chemistry Chapter 1
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Topics from which case study questions may be asked
- First law of thermodynamics
- Internal energy and enthalpy
- Hess’s law
- Gibbs free energy
Thermodynamics teaches us the principles behind energy transformations in physical and chemical processes.
For further practice on case study questions related to Chemical Thermodynamics Class 11 Chemistry, we recommend exploring the link given below.
Frequently Asked Questions (FAQs) on Chemical Thermodynamics Case Study Questions
Q1: What are case study questions in Chemical Thermodynamics?
A1: These are application-based questions that assess understanding of Chemical Thermodynamics concepts.
Q2: Are case study questions part of CBSE Class 11 Chemistry?
A2: Yes, CBSE includes case study/competency-based questions in exams.
Q3: How can I prepare for Chemistry case study questions?
A3: Focus on conceptual clarity, real-life applications, and NCERT-based understanding.
Q4: Are answers provided for Chemical Thermodynamics case study questions?
A4: Yes, detailed answers are provided for all case study questions.
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