Question

Question 2 of 25

Which symbol in the first law of thermodynamics represents the result of a

gas expanding against a constant pressure?

O A. a

B. V

C. U

D. W

Answer 1

Answer: The symbol representing the result of a gas expanding against a constant pressure is W

Step-by-step explanation:

According to first law of thermodynamics, energy can neither be destroyed nor created but rather transferred to one place to another and converted to and from other energy forms.

The mathematical form of first law of thermodynamics is:

`\Delta U=q+W`

where
`\Delta U` = change in internal energy

q = heat absorbed or released

W = work
`(W= P\Delta V)`

P = pressure

`\Delta V` = volume change

Thus the changes in heat or work leads to change in internal energy.