An ideal gas (the system)is contained in a flexible balloon at a pressure of 1 atm and is initially at a temperature of 20.°C.The surrounding air is at the same pressure,but its temperature is 25°C.When the system has equilibrated with its surroundings,both system and surroundings are at 25°C and 1 atm.In changing from the initial to the final state,which one of the following relationships regarding the system is correct? A)ΔU 0 E)q 0

Question

An ideal gas (the system)is contained in a flexible balloon at a pressure of 1 atm and is initially at a temperature of 20.°C.The surrounding air is at the same pressure,but its temperature is 25°C.When the system has equilibrated with its surroundings,both system and surroundings are at 25°C and 1 atm.In changing from the initial to the final state,which one of the following relationships regarding the system is correct?
A)ΔU < 0
B)ΔU = 0
C)ΔH = 0
D)W > 0
E)q > 0

Quizplus · Accepted Answer

The system absorbs heat from the surroundings to increase its temperature from 20°C to 25°C, resulting in q > 0.

An Ideal Gas (The System)is Contained in a Flexible Balloon