Question

(a) The calorific value of hydrogen is $150000$ $kJ/kg$. What does this mean?
(b) Even though the calorific value of hydrogen is very high, it is not used as a household fuel. Why?
(c) Give a situation in which this fuel is used.

Answer 1

(a) $1$ $kg$ of hydrogen on burning produce $150000$ $kJ$ of energy.

(b) Hydrogen is not used as a fuel as it burns at a very high temperature and is hence not feasible for daily use.

(c) Hydrogen is used as a fuel in rockets.