$1.($a$)$ During an isochoric $($constant volume$)$ pressurization of an ideal monatomic gas, $100$J of heat is added to the

gas. What is the work done by the gas, and the change in its internal energy?

$($b$)$ During an isothermal $($constant temperature$)$ expansion of an ideal monatomic gas, $100$J of heat is added to the

gas. What is the work done by the gas, and the change in its internal energy?

$($c$)$ During an isobaric $($constant pressure$)$ expansion of an ideal monatomic gas, $100$J of heat is added to the gas.

What is the work done by the gas, and the change in its internal energy?