Question

A process in which temperature remains constant is, E a polytropic process. an impossible process. an adiabatic process. an isochoric process. an isothermal process.

Answer 1

a). For isothermal precess temperature remains constant.

b). It is not necessary to use C_{​​​​​​p} at constant pressure. It can be used in any process where change in enthalpy is required.

$\Delta$h = C_{​​​​​​p} $\Delta$ T. So statement is false.

C). Isochoric specific heat of oxygen is 0.658 KJ/kg.k (From table of specific heat of various gases)

Change in internal energy for an ideal gas is defined as

$\Delta$U = C_v $\Delta$ T = (0.658 KJ/kg.k)( 625k-410k) = 141.47 KJ/kg