Question

9.
If the external pressure is more than the internal pressure then what will be the sign convention
for the work done on a cylinder fitted with a frictionless and weightless piston containing one
mole of an ideal gas?

Answer 1

storage tank tested to destruction with an internal vacuum (external pressure). ... External pressure can be created three ways: From a vacuum inside a vessel and atmospheric pressure outside. From a pressure outside a vessel greater than atmospheric (typically from some types of jacket or a surrounding vessel)