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Q.

The ΔHf∘  for CO2(g) and H2O(g)  are −395.5 ,−110.5 and −241.8 KJ. mole−1  respectively. The standard enthalpy change in kJ for the reaction. CO2(g)+H2(g)→CO(g)+H2O(g)

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a

-262.5  

b

+524.1        

c

+41.2      

d

-41.2 

answer is B.

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