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Question

:For the reaction

C2H4(g)+3O2(g)2CO2(g)+2H2O(l);

ΔE = 1415kJ. The ΔH at 270C is


A
1410kJ
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B
1420kJ
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C
+1420kJ
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D
+1410kJ
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Solution

The correct option is B 1420kJ
ΔH=ΔE+ΔngRT
= 1415+(2)×8.314×300× 103
= 14154.98kJ
Δng= 231
= 2
1419.98
1420kJ

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