Problem: Consider the following four casesi. A chemical process in which heat is absorbed.ii. A change in which q = 30 J, w = 44 J.iii. A process in which a system does work on its surroundings with no change in qq.iv. A process in which work is done on a system and an equal amount of heat is withdrawn.In how many of these cases does the internal energy of the system decrease?a. 0b. 1c. 2d. 3e. 4

FREE Expert Solution

E = q + w


i. A chemical process in which heat is absorbed.

heat absorbed → +q → ↑ E


ii. A change in which q = 30 J, w = 44 J.

E = 30 + 44 → ↑ E


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Problem Details

Consider the following four cases

i. A chemical process in which heat is absorbed.
ii. A change in which q = 30 J, w = 44 J.
iii. A process in which a system does work on its surroundings with no change in qq.
iv. A process in which work is done on a system and an equal amount of heat is withdrawn.

In how many of these cases does the internal energy of the system decrease?

a. 0

b. 1

c. 2

d. 3

e. 4

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