During an isothermal expansion of an ideal gas

Options

A. Its internal energy decreases
B. Its internal energy does not change
C. the work done by the gas is equal to the quantity of heat absorbed by it.
D. both b and c are correct

Answer

d

Explanation

In isothermal process, temperautre remains constant
`because DeltaU=nC_(v)DeltaT=0 (because DeltaT=0)`
According to the first law of thermodynamics.
`DeltaH=DeltaU+DeltaW`
`therefore DeltaH=DeltaW (because DeltaU=0)`
Hence, (d) is correct.