The pressure, temperature and volume of a system change differently during the process of isothermal expansion. indicate whether each quantity increases,remains constant, or decreases.
your answers should describe the changes of pressure, temperature, and volume (in that order). separate your answers with commas (e.g., i,c,d means pressure increases, temperature remains constant, and volume decreases).

For the isothermal expansion process ,The volume will increase and the pressure will decrease.But the temperature will remain constant.

Pressure - D

Temperature -C

Volume - I

Explanation:

If the temperature of the process remain same then this process is known as constant temperature process or also known as isothermal process.

In the isothermal process final and initial temperature is remain same.

The isothermal process given as

P V = C

P=Pressure   , V=Volume  ,C=Constant

P₁V₁=P₂V₂

For the isothermal expansion process ,The volume will increase and the pressure will decrease.But the temperature will remain constant.

Pressure - D

Temperature -C

Volume - I

D: That her heart was smiling and welcoming him.

Explanation:

Alex is very happy to have found the crow, and looking at the other options none of them convey the same emotion as the original sentence.

A makes it seem like it's a fragile and sensitive moment, stemming from sadness.

B It appears as if she couldn't care less about the bird, and would leave it behind.

C More of something you'd see in a love story between two people, resembling nervousness or being starstruck.