An ideal monatomic gas expands at a constant pressure of 120 kPa from an initial volume of 2.0 L to a final volume of 5.0 L. If the temperature of the gas remains constant, how much heat flows into the gas?

Question

Quizplus · Accepted Answer

The heat flow into the gas during an isobaric (constant pressure) process can be calculated using the formula $Q = P\Delta V$, where $Q$ is the heat added to the system, $P$ is the pressure, and $\Delta V$ is the change in volume. Given that $P = 120$ kPa (which is $120,000$ Pa) and $\Delta V = 5.0\,L - 2.0\,L = 3.0\,L = 0.003\,m^3$ (since $1\,L = 0.001\,m^3$), we find $Q = 120,000\,Pa \times 0.003\,m^3 = 360\,J$.

An Ideal Monatomic Gas Expands at a Constant Pressure of 120