When a sample of an ideal gas is allowed to expand at constant temperature against an
atmospheric pressure, __________.
A) Surroundings do work on the system
B) ∆U = 0
C) no heat exchange takes place between the system and surroundings.
D) internal energy of the system increases.
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Answer:
bro answer is B) mark me as brainiest
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Answer:
The Correct Answer is Option (B): ΔU = 0
Explanation:
When a sample of an ideal gas is allowed to expand at constant temperature against an atmospheric pressure, ΔU will be equal to zero,
The sum of all the kinetic energies of the individual gas molecules is the internal energy U of our system.
As a result, as the gas's temperature T rises, the gas molecules speed up, and the gas's internal energy U rises (which means ΔU, U is positive).
Similarly, as the gas's temperature T drops, the gas molecules slow down, and the gas's internal energy U drops (which means ΔU, U is negative).
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