Question

In an isothermal process, the volume of an ideal gas is halved. One can say that ____________.

विकल्प

• internal energy of the system decreases

• work done by the gas is positive

• work done by the gas is negative

• internal energy of the system increases

Answer 1

In an isothermal process, the volume of an ideal gas is halved. One can say that work done by the gas is negative.

Explanation:

For an Isothermal process,

dU = 0 and work done = dW = P (V₂ - V₁)

`therefore "v"_2 = "v"_1/2 = "v"/2`

`therefore "dW" = - "PV"/2`