Q.
The heat of neutralization of a strong acid and a strong base (or) alkali is -57.0 kJ/mol. The heat released when 0.5 mole of HNO3 solution is mixed with 0.2 mole of KOH is
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a
57.0 kJ
b
11.4 kJ
c
28.5 kJ
d
34.9 kJ
answer is B.
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Detailed Solution
The heat of neutralization of a strong acid and a strong base (or) alkali is -57.0 kJ/mol. The heat released =?Neutralization Reaction,HNO3+KOH→KNO3+H2OLimiting reagent is KOH. Only 0.2 moles of each HNO3 and KOH will be neutralized 1 mole of H2O formation releases 57.0 kJ/mole 0.2 mole of the enthalpy change: =−57.0×0.2∴ΔH=−11.4 kJ/mole.
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