The mass analysis of a hydrocarbon fuel is as follows : C = 84 %; H2 = 15% and the balance is incombustible material. Find (i) mass of air required per kg of fuel for complete combustion, (ii) analysis of wet exhaust gases, by mass and volume, if 20 kg fuel are supplied, (iii) partial pressure of the steam formed in the exhaust gases if the total pressure of the exhaust is 1.03kg/cm2, (iv) heat carried away by dry exhaust gases formed per kg of fuel if the temperature of exhaust gas is 375o C and the ambient temperature is 24o C. Take Cp for dry gases = 0.24kcal/kgo K.