MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
Assume each reaction is carried out in an open container. For which reaction will H = E ? (CBSE AIPMT 2006) (a) H (g) Br (g) 2HBr(g) → (b) C(s) 2H O(g) 2H (g) CO (g) → (c) PCl (g) PCl (g) Cl (g) → (d) 2CO(g) O (g) 2CO (g) →
Answer
A
Explanation
E H nRT For E H to be same n should be 0. product reactant n n n For the reaction – 2 2 H (g) Br (g) 2HBr(g) → n = 2 – 2 = 0 Hence E H is same.
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