When 1.0 g of oxalic acid `(H_(2)C_(2)O_(4))` is burnt in a bomb calorimeter whose capacity is 8.75 KJ/K, the enthalpy of combustion of oxalic acid at`27^(@)C` is :A. `-245.7kJ//mol`B. `-244.452kJ//mol`C. `-241.5kJ//mol`D. None of these

When 1.0 g of oxalic acid `(H_(2)C_(2)O_(4))` is burnt in a bomb calor

1.	When 1.0 g of oxalic acid `(H_(2)C_(2)O_(4))` is burnt in a bomb calorimeter whose capacity is 8.75 KJ/K, the enthalpy of combustion of oxalic acid at`27^(@)C` is :A. `-245.7kJ//mol`B. `-244.452kJ//mol`C. `-241.5kJ//mol`D. None of these
Answer» Correct Answer - D `H_(2)C_(2)O_(4)(l)+(1)/(2)O_(2)(g)rarrH_(2)O(l)+2CO_(2)(g)`, `Deltan_(g)=3//2` `DeltaU_(c )=-(0.312xx8.75)/(1)xx90` =-245.7 kJ/mol `DeltaH=DeltaU+Deltan_(g)RT` `=-245.7 +(3)/(2)xx(8.314xx300)/(1000)` =-241.95 kJ/mol

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When 1.0 g of oxalic acid `(H_(2)C_(2)O_(4))` is burnt in a bomb calorimeter whose capacity is 8.75 KJ/K, the enthalpy of combustion of oxalic acid at`27^(@)C` is :A. `-245.7kJ//mol`B. `-244.452kJ//mol`C. `-241.5kJ//mol`D. None of these

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