Question

Which of the following statements is correct? During a change of state:

A.The internal energy of a system increases

B. Latent heat is absorbed

C. Work is done and bonds are broken

D. Work is done and /or bonds are being broken or constructed

Answer 1

$\text{A. False}$

$\text{The internal energy of the system with a change in state can}\newline \text{both increase and decrease.}$

$\text{B. False}$

$\text{Latent heat can be absorbed or released by a substance}\newline \text{during a change in its state.}$

$\text{C.False}$

$\text{The breaking of bonds never releases energy to the external}\newline \text{ environment.}$

$\text{D.True}$

$\text{When old bonds are being broken and constructed}\newline \text{ new bond works is done.}$

$\text{Answer: D}$