Question 10
A change in the physical state can be brought about
(a) Only when energy is given to the system
(b) Only when energy is taken
(c) When energy is either given to, or taken out from the system
(d) Without any energy change

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Solution

A change in the physical state can be brought about When energy is either given to or taken out from the system. Hence option C is correct.

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Q. Question 10
A change in the physical state can be brought about
(a) Only when energy is given to the system
(b) Only when energy is taken
(c) When energy is either given to, or taken out from the system
(d) Without any energy change

Q. Assertion :When an ideal gas is taken from a given thermodynamics state

A

to another given thermodynamic state

B

by any polytropic process, the change in the internal energy of the system will be the same in all processes. Reason: Internal energy of the gas depends only upon its absolute temperature.

Q. STATEMENT-1 : When an ideal gas is taken from a given thermodynamics state A to another given thermodynamic state B by any polytropic process, the change in the internal energy of the system will be the same in all processes.

STATEMENT-2 : Internal energy of the ideal gas depends only upon its absolute temperature.

The internal energy change when a system goes from state $A$ to $B$ is $40 k J m o l e^{- 1}$ . If the system goes from $A$ to $B$ by a reversible path and returns to state $A$ by an irreversible path, what would be the net change in internal energy?