DAY 13 – DAW February

Otto and Diesel engines, Gibbs’ phase rule and chemical potential;


Q 1. What is Gibbs’ phase rule? Find the values of degree of freedom when (i) Only the liquid CO2CO_2 is in equilibrium with the gaseous CO2CO_2 (ii) Water is in the vapour-liquid saturation region. (iii) Water is in a single-phase region. (iv) Water is at the triple point. [15 Marks]

Q 2. Describe Otto cycle and obtain an expression for its efficiency.Show that it is lower than that of a Carnot cycle operating between the highest and lowest temperature of Otto cycle. [20 Marks]

Video Solution at 11 pm