) A Carnot engine is a heat engine with maximal efficiency. Describe the steps in a Carnot cycle operating between T,diagram below.150°C and T, = 20°C. You may refer to the

Calculate the heat input, QH, to the Carnot engine during step a →the working substance consists of 56 moles of an ideal gas and the volume at points a, b are Va = 1.0 m³ and V, = 2.5 m³.·b assuming that Give the expression of the heat output Qc. ) An expression relating temperature, T, and volume, V, at different points is given \text { by } T_{1} V_{1}^{\gamma-1}=T_{2} V_{2}^{\gamma-1} i. State the conditions for which the expression given is valid. ii. Use the expression to find a ratio between the volumes at point c and point d. ) Find the ratio between |Qc[ and Q# and use it to find a numerical value of the efficiency of the Carnot engine in this question. Express your answer as a fraction and a percentage.