Cv vs. Cp

[Shane_Yu_3K]

Hello,

When do we use Cv and when do we use Cp?

Thank you!

[Aditya Desai 1A]

constant volume = Cv, constant pressure = Cp

[Hannah Jin 1J]

Cv is the molar heat capacity at constant volume and Cp is the molar heat capacity at constant pressure.

[Collin Le 3I]

Cv is used when the system is at constant volume. Cp is used when the system is at constant pressure.

[Russell Chuang 1J]

We use Cv when we want to keep volume constant, and we use Cp when we keep pressure constant. Cp will be higher than Cv because Cv does not have to lose energy to work of expansion.

[Anisa Subbiah 14B 1L]

CV. is the heat at constant volumes, while CP is heat at constant pressure. The central difference is the volume change is zero for CV and pressure change is zero for CP.

[Isabelle Kim 3E]

Cv is measuring the amount of heat at a constant volume, whereas Cp is measuring the amount of heat at a constant pressure. In both constants, the measurements are in relation to the changing temperature. Both of them are trying to describe the behavior of a certain substance/particle in response to changes in temp/pressure.
Also, we are talking about internal energy for Cv and enthalpy energy for Cp.

[Caitlyn Lo 2F]

Cv is the molar heat capacity at constant volume and Cp is the molar heat capacity at constant pressure

[Rebecca Preusch 2C]

Use Cv for volume and Cp when pressure is given.

[Charlie Sjogren-Black]

Cv is used with constant volume. Cp is used with constant pressure.

[Julie Mai 1K]

Hello!

You use Cv when a system is at a constant volume and you use Cp when a system is at a constant pressure.

[Alex Luong 3H]

Cv is for systems under constant volume (isochoric) and Cp is for systems under constant pressure (isobaric).