Question

Which of the following is a statement of the first law of thermodynamics?

A) Energy cannot be created or destroyed.
B) The entropy of the universe is decreasing.
C) The entropy of the universe is constant.
D) Energy cannot be transferred or transformed

Answer 1

A) Energy cannot be created or destroyed

Answer 2

For this case what you should know is the statement of the first law of thermodynamics.

By definition, we have to:

• This law establishes that energy is not created, nor destroyed, but is conserved.
• Then we have that when a certain system is subjected to a thermodynamic cycle, the heat given by the system will be equal to the work received by it, and vice versa.

In equation mode we have to:

`Q-W = 0`

Where,

1. Q: heat
2. W: work done

Answer:

A) Energy can not be created or destroyed.