4) Given the reactions (1) and (2) below, determine (i) A,H° and A,U° for reaction (3), and (ii) A;H° for both H20(g) and HI(g), all at 298 K. (1) H2(g) + I2(s) → 2HI(g) A:H° = +52.96 kJ mol1 (2) 2H2(g) + O2(g) → 2H2O(g) A,H° = -483.64 kJ mol1 (3) 4HI(g) + O2(g) → 2l2(s) + 2H2O(g)

4) Given the reactions (1) and (2) below, determine (i) A,H° and A,U° for reaction (3), and (ii) A;H° for both H20(g) and HI(g), all at 298 K. (1) H2(g) + I2(s) → 2HI(g) A:H° = +52.96 kJ mol1 (2) 2H2(g) + O2(g) → 2H2O(g) A,H° = -483.64 kJ mol1 (3) 4HI(g) + O2(g) → 2l2(s) + 2H2O(g)

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter17: Spontaneity, Entropy, And Free Energy

Section: Chapter Questions

Problem 4ALQ: What types of experiments can be carried out to determine whether a reaction is spontaneous? Does...

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Question

4) Given the reactions (1) and (2) below, determine (i) A,H° and A,U° for reaction (3), and (ii) A,H° for
both H20(g) and HI(g), all at 298 K.
(1) H2(g) + I2(s) → 2HI(g)
A:H° = +52.96 kJ mol1
(2) 2H2(g) + O2(g) → 2H20(g)
A,H° = -483.64 kJ mol1
(3) 4HI(g) + O2(g) → 212(s) + 2H2O(g)

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Given data,

Delta H for equation 1 = +52.96kJ/mol

Delta H for equation 2 = -483.64kJ/mol

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