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28/09/2021 8:29 pm
Topic starter
Substance A2B(g) can undergoes decomposition to form two set of products :
A2B(g) → A2(g) + B(g) ; ΔH° = 40 kJ/ mol
A2B(g) → A(g) + AB(g) ; ΔH° = 50 kJ / mol
If the molar ratio of A2(g) to A (g) is 5 : 3 in a set of product gases, then the energy involved in the decomposition of 1 mole of A2B (g) is:
(a) 48.75 kJ/mol
(b) 43.73 kJ/mol
(c) 46.25 kJ/mol
(d) None of these
1 Answer
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28/09/2021 8:35 pm
Correct answer: (b) 43.73 kJ/mol
Explanation:
ΔrH = \(\frac{5}{8}\) x 40 + \(\frac{3}{8}\) x 50
= 43.73 kJ/mol