Chemical Engineering Thermodynamics: Assuming the working fluid in n Brayton power cycle is an ideal gas of constant heat capacity. show that the efficiency of the cycle is and obtain an explicit expression for the efficiency in terms of the cycle temperature Assuming the working Huid in a Brayton power cycle is an ideal gas of constant heat capacity. show that the chciency of the cycle is -(Wu-W) W and obtain an explicit expression for the efficiency in terms of the cycle temperatures