Problem: Which of the following is true of a reaction in which ΔV is positive?a. ΔH = ΔEb. ΔH > ΔEc. ΔH < ΔE

FREE Expert Solution

Which of the following is true of a reaction in which ΔV is positive?

w = –PΔV

ΔV is positive → w

(–): work is done by the system to the surroundings (expansion)


ΔE = q + w

At constant external pressure:

q = ΔH

ΔE = ΔH + w


if ΔH = ΔE:

ΔE = ΔH + w

ΔE - ΔH = 0

w = 0


if  ΔH > ΔE:

ΔE = ΔH + w

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Problem Details

Which of the following is true of a reaction in which ΔV is positive?
a. ΔH = ΔE
b. ΔH > ΔE
c. ΔH < ΔE

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