Problem

An ideal gas is taken through a cyclic thermodynamic process through four steps. The amounts of heat involved in these steps are

Q_1 = 5960 \text{ J}

Q_2 = -5585 \text{ J}

Q_3 = -2980 \text{ J}

and

Q_4 = 3645 \text{ J}

respectively. The corresponding quantities of work involved are

W_1 = 2200 \text{ J}

W_2 = -825 \text{ J}

W_3 = -1100 \text{ J}

and

W_4

respectively. (JEE 1994) (a) Find the value of

W_4

. (b) What is the efficiency of the cycle?