Question

(2) 2TO
(3) en
20. A sample of an ideal gas undergoes an isothermal
expansion. If da, dU and DW represent the amount
of heat supplied, the change in internal energy and
the work done respectively, then
(1) dQ = +ve, dU = +ve, DW = +ve
(2) dQ = +ve, dU = 0, DW = +ve
(3) dQ = +ve, dU = +ve, dw = 0
(4) dQ = -ve, dU = -ve, DW = -ve​

Answer 1

Answer:

the answer is 1.dQ=+ve,dU=+ve,DW=+ve