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CHM 101 CHM 101 Past Questions Objective Question

Question

An ideal gas is compressed from 400 mL to 60.0 mL against a constant pressure of 8.00 atm, releasing 140 J of heat to the surroundings. What is ΔU?
Options
A -135.6 J
B +135.6 J
Correct Answer
C +415.6 J
D -415.6 J
Correct Answer

Option B is the correct answer.

Detailed Explanation

w = -(8 * 101325 Pa) * (60 - 400) * 10^-6 m³ = +275.6 J. Heat released means q = -140 J. ΔU = -140 + 275.6 = +135.6 J.

Hint

No hint available

Question Info