MCQ
Which of the following are state functions?
- AEnthalpy.
- BHeat.
- CFree energy.
- DWork.
Explanation:
Because these depend upon initial and final state and not on path.
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$NH _{2} CN _{( s )}+\frac{3}{2} O _{2}( g ) \rightarrow N _{2( g )}+ O _{2}( g )+ H _{2} O _{(l)}$
is ............ $kJ$. (Rounded off to the nearest integer)
[Assume ideal gases and $\left. R =8.314\, J\, mol ^{-1} K ^{-1}\right]$
$C_2H_4(g) + H_2(g) \to C_2H_6(g)$
.......$kJ$
| Bond | Bond energy $(kJ)$ |
| $C-H$ |
$413$ |
| $C-C$ | $348$ |
| $C=C$ | $610$ |
| $H-H$ | $436$ |