Ask Question
26 August, 20:09

At constant pressure, which of these systems do work on the surroundings? A (s) + B (s) ⟶ C (g) A (s) + B (s) ⟶C (g) 2 A (g) + 2 B (g) ⟶ 5 C (g) 2A (g) + 2B (g) ⟶5C (g) A (g) + B (g) ⟶ C (g) A (g) + B (g) ⟶C (g) 2 A (g) + 2 B (g) ⟶ 3 C (g)

+4
Answers (1)
  1. 26 August, 20:36
    0
    Correct question:

    At constant pressure, which of these systems do work on the surroundings?

    (a) A (s) + B (s) ⟶ C (g)

    (b) 2 A (g) + 2 B (g) ⟶ 5 C (g)

    (c) A (g) + B (g) ⟶ C (g)

    (d) 2 A (g) + 2 B (g) ⟶ 3 C (g)

    Answer:

    (a) A (s) + B (s) ⟶ C (g)

    (b) 2 A (g) + 2 B (g) ⟶ 5 C (g)

    Explanation:

    Work done by a system on the surroundings at a constant pressure is given as;

    W = - PΔV

    Where;

    ΔV is gas expansion, that is final volume of the gas minus initial volume of the gas must be greater than zero.

    Part (a)

    A (s) + B (s) ⟶ C (g)

    ΔV = 1 - (0) = 1 (expansion)

    Part (b)

    2 A (g) + 2 B (g) ⟶ 5 C (g)

    ΔV = 5 - (2 + 2) = 1 (expansion)

    Part (c)

    A (g) + B (g) ⟶ C (g)

    ΔV = 1 - (1 + 1) = - 1 (compression)

    Part (d)

    2 A (g) + 2 B (g) ⟶ 3 C (g)

    ΔV = 3 - (4) = - 1 (compression)

    Thus, systems where there is gas expansion are in part (a) and part (b). The correct answers are:

    (a) A (s) + B (s) ⟶ C (g)

    (b) 2 A (g) + 2 B (g) ⟶ 5 C (g)
Know the Answer?
Not Sure About the Answer?
Find an answer to your question 👍 “At constant pressure, which of these systems do work on the surroundings? A (s) + B (s) ⟶ C (g) A (s) + B (s) ⟶C (g) 2 A (g) + 2 B (g) ⟶ 5 ...” in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers