19 million joules of chemical energy are supplied to a boiler in a power plant. 5 x 106 joules of energy are lost through unburnt fuel. the boiler radiates 1.1 million joules to the atmosphere. what is the efficiency of the boiler?

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.