A steam boiler made up of steel weights 900 kg. The boiler contains 400 kg of water. Assuming 70% of the heat is delivered to boiler and water. Heat required to raise the temperature of the whole from 10^(@)C to 100^(@)C is (Heat capacity of steel is 0.11 kcal/kg-K and heat capacity of water is 1 kcal /kg-K)

A steam boiler made up of steel weights 900 kg. The boiler contains 40

1.	A steam boiler made up of steel weights 900 kg. The boiler contains 400 kg of water. Assuming 70% of the heat is delivered to boiler and water. Heat required to raise the temperature of the whole from 10^(@)C to 100^(@)C is (Heat capacity of steel is 0.11 kcal/kg-K and heat capacity of water is 1 kcal /kg-K)
Answer» 63550kcal 64200k cal 64157 K cal 65250 k cal Solution :`DeltaH` required for heating `=underset(("boiler"))(mSDeltaT)+underset(("water"))(mSDeltaT)` `=0.11xx900xx90+1xx400xx90=44910` k cal Since only 70% of HEAT GIVEN is used up to do so. THUS actual heat required `=(44910xx100)/70=64157` KCAL