Question

If a gas expands at constant temperature, it indicates that
(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4)​Kinetic energy of molecules remains the same

Answer 1

If a gas expands at constant temperature, it indicates that
(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4)​Kinetic energy of molecules remains the same
Ans. (3) Pressure of the gas increases
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Answer 2

Answer: kinetic energy of the molecules remains the same.

Explanation:

K.E = 3/2 RT

R is universal gas constant

T is constant ( given).

Hence kinetic energy remains constant.