Physical Chemistry Questions and Answers – Thermodynamics Definition and Types

This set of Physical Chemistry Multiple Choice Questions & Answers (MCQs) focuses on “Thermodynamics Definition and Types”.

1. Which of the following is an intensive property?
a) Mass
b) Temperature
c) Surface Tension
d) Viscosity
View Answer

Answer: b
Explanation: Temperature is an intensive property because it does not depend on the amount of the substance for which it is measured.

2. In which of the following temperature decreases?
a) Adiabatic Expansion
b) Adiabatic Compression
c) Isothermal Expansion
d) Isothermal Compression
View Answer

Answer: a
Explanation: The Adiabatic Compression of a gas causes a rise in temperature of a gas. Adiabatic Expansion against pressure, or a spring, causes a drop-in temperature.

3. Which one of these are state variables?
a) Pressure
b) Heat
c) Work
d) Viscosity
View Answer

Answer: a
Explanation: Variables like pressure, volume and temperature are called state variables or state functions because their values depend only on the state of the system and not on how it is reached.

4. What is Standard Enthalpy of Vaporization?
a) Heat required to vaporize one mole of liquid at constant temperature and under standard pressure
b) It is the relation between the heat and other forms of energy
c) Change for the formation of one mole of compound from their elements in most stable states
d) Enthalpy change which occurs when one mole of an ionic compound dissociates into its ions in gaseous state
View Answer

Answer: a
Explanation: The enthalpy of vaporization states that, heat is given to any liquid substance at certain temperature, the liquid changes into gaseous form.

5. The architecture used by Cloud workloads is ___________
a) Event-driver
b) Distributed
c) Data-centric
d) Component-based
View Answer

Answer: b
Explanation: The Cloud workloads uses a distributed architecture. Failover and scaling are built into the application and it can scale out by adding more instances to the meet the demand.

6. Is spontaneous process an irreversible process.
a) False
b) True
View Answer

Answer: b
Explanation: A spontaneous process is an irreversible process and can only be reversed by some external agency.

7. When the energy is exchanged between the system and the surrounding, it is exchanged as?
a) Heat
b) Viscosity
c) Density
d) Force
View Answer

Answer: a
Explanation: When the energy is exchanged between the system and the surrounding, it is exchanged as either heat or work. General equation: ΔE = q + w.

8. 1 Calorie equals to?
a) 7.189 J
b) 6.483 J
c) 5.882 J
d) 4.184 J
View Answer

Answer: d
Explanation: Non-SI unit is still in widespread use: The Calorie (Cal). 1 Calorie = 4.184 J.

9. The service in which the cloud consumer does not manage the underlying cloud infrastructure nor the application(s) contained in the instances as the service provides user with all of it is?
a) S = q / (v ΔT)
b) S = q / (m ΔT)
c) S = q T
d) S = q m
View Answer

Answer: b
Explanation: Specific Heat = heat transferred / (mass * temperature change).

10. Identify the correct statement from the following in a chemical reaction.
a) The enthalpy always decreases
b) The entropy always increases
c) The change in entropy along with suitable change in enthalpy decides the fate of reaction
d) Both the enthalpy and entropy remain constant
View Answer

Answer: c
Explanation: The change in entropy affects the reaction. In an Exothermic reaction, the entropy increases. In an Endothermic reaction, the entropy decreases.

Sanfoundry Global Education & Learning Series – Physical Chemistry.

To practice all areas of Physical Chemistry, here is complete set of Multiple Choice Questions and Answers.

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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