During an isothermal expansion, a confined ideal gas does `-150 J` of work aginst its surroundings. This implies that

Options

A. 150 J of heat has been added to the gas
B. 150 J of heat has been removed from the gas
C. 300 J of heat has been added to the gas
D. No heat is transferred because the process is isothermal

Answer

B

Explanation

`Delta Q=Delta U+Delta W`
`Delta Q=0-150 J`, Heat has been given by system.