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Chemistry Question on Thermodynamics

For the reaction CO(g)+12O2(g)−>CO2(g) {CO(g) + \frac{1}{2} O_2 (g) -> CO_2 (g)} Which one of the statement is correct at constant T and P ?

A

ΔH=ΔE\Delta H = \Delta E

B

ΔH<ΔE\Delta H < \Delta E

C

ΔH>ΔE\Delta H > \Delta E

D

ΔH\Delta H is independent of physical state of the

Answer

ΔH<ΔE\Delta H < \Delta E

Explanation

Solution

Δn=−12;ΔH=ΔE−12RT;⇒ΔE>ΔH {\Delta n = - \frac{1}{2} ; \Delta H = \Delta E - \frac{1}{2} RT; \Rightarrow \Delta E > \Delta H}