Answer to Question #288292 in Molecular Physics | Thermodynamics for harry

Question

A gas in a closed container is added with 20J of heat. The lid to the container is then lifted for 20 cm with 2.5 N of force. Calculate how much the energy added to the system.

Answer 1

$Q=U+A=U+Fl=20+2.5\cdot 0.2=20.5~J.$