AIPMT MAINS2011Physics-Thermodynamics
AIPMT MAINS 2011 Physics Hess's Law MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Consider the following process
ΔH(kJ/mol)
1/2 Å → B + 150 3B → 2C + E + A → 2D + 350
For B + D → E + 2C, ΔH will be
A
-325 kJ/mol
B
325 kJ/mol
C
525 kJ/mol
D
-175 kJ/mol
Correct Answer
Option D
Detailed Explanation
By using Hess's law, we can add the enthalpy changes of the given reactions to find the enthalpy change for the desired reaction. The calculation gives ΔH = -175 kJ/mol.
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