First slide

Hydrogen as a fuel

Question

Statement-I: Calorofic value of hydrogen is more than that of petrol
Statement-II: Heat of combustion of hydrogen is less than that of petrol

Moderate

A

I is true, II is false
B

I and II are false
C

I and II are true
D

I is false, II is true

Solution

$\large \left. {\begin{array}{{20}{c}} {Calorofic\;value:} \\ {[per\;gram]} \end{array}\begin{array}{{20}{c}} {143kg/gm} \\ {{H_2}(gas)} \end{array}} \right\rangle \begin{array}{{20}{c}} {53kJ/gr} \\ {LiQ.petrole} \end{array}\$
$\large \begin{array}{{20}{c}} {Heat\;of\;combusion:} \\ {[per\;mole]} \end{array}\begin{array}{{20}{c}} {{H_2}(gas)} \\ {286\;KJ/mole} \end{array}\left\langle {\begin{array}{{20}{c}} {LiQ.petrole} \\ {2220KJ/mole} \end{array}} \right.\$
Statement I and Statementy II are true
Calorofic value: The heat produced when one gram of substance completely burnt in excess of oxygen
Heat of combustion : The heat released when one mole of substance completely burnt in excess of oxygen.

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