Thermodynamics-Laws of Thermodynamics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 3 of 4

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Question number: 1

» Thermodynamics » Laws of Thermodynamics » Second Law of Thermodynamics

Appeared in Year: 2010

MCQ▾

Question

A piece of hot copper at 1000C is plunged into a pond at 300C. The copper cools down to 300C, while the pond, being huge, stays at its initial temperature. Then-

Choices

Choice (4) Response
a.

Copper loses some entropy; the pond stays at the same entropy

b.

Copper loses some entropy, and the pond gains exactly the same amount of entropy

c.

Copper loses entropy and the pond gains more than this amount of entropy

d.

copper and the pond gain in entropy

Question number: 2

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

Appeared in Year: 2010

MCQ▾

Question

A van der Waal’s gas obeys the equation of state (P+n2aV2)(Vnb)=nRT . Its internal energy is given by U=CTn2aV . The equation of quasistatic adiabatic for this gas is given by-

Choices

Choice (4) Response
a.

TCnR(Vnb)=constant

b.

PC+nRnR(Vnb)=constant

c.

TCnRV=constant

d.

TC+nRnRV=constant

Question number: 3

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

Appeared in Year: 2011

MCQ▾

Question

A container with rigid walls is covered with perfectly insulating material. The container is divided into two parts by a partition. One part contains a gas while the other is fully evacuated (vacuum). The partition is suddenly removed. The gas rushes to fill the entire volume and comes to equilibrium after a little time. If the gas is not ideal.

Choices

Choice (4) Response
a.

The initial pressure of the gas equals its final pressure

b.

The initial temperature of the gas equals its final temperature

c.

The initial internal energy of the gas equals its final internal energy

d.

The initial entropy of the gas equals its final entropy

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