Constant Volume

[samanthaywu]

Under constant volume I believe the equation for entropy was something like delta S = n Cv ln(T2/T1). Is this Cv value only different from the Cp value when there is a change in the number of moles of gas in the reaction?

[Chem_Mod]

Cp and Cv just refer to what is held constant. The two have different values and for ideal gases can be found on the equation sheet.

[Laura 3l]

The difference between Cv and Cp is that Cv is when volume is constant and Cp is when pressure is constant.

[Becca Nelson 3F]

Cv refers to the constant when volume is constant, for an ideal gas it is 3/2*8.314. Cp refers to when the pressure is constant and this value is higher at 5/2*8.314. Hope this helps!

[isha dis3d]

Cv and Cp are used when there are constant volume and constant pressure, respectively, when the temperature is changing. I believe you use the table which states CV an CP for either atoms, linear, or non-linear molecules.

[Shreyank Kadadi 3K]

Yes, you can see the difference in Cv and Cp on the equation sheet. The only difference between the two is that Cv is used in systems with constant volume and Cp is used in systems with constant pressure.

[VincentLe_3A]

You would utilize the Cv constant in systems under conditions of constant volume while Cp in systems under conditions of constant pressure.

[Annabella_Amato_1I]

Hi! The Cv constant is used for processes that are done under constant volume and is shown on the reference table to be 3/2*R for ideal gases. Cp is used for constant pressure and is solved as 5/2*R for ideal gases.

[Astha Sahoo 3I]

The Cv value is always less than the Cp value, the constant for Cp is always one more than the constant for Cv. There are different values for linear, non-linear, and monatomic molecules.

[Kiana Tashakori 1D]

Cp is used for constant pressure and Cv is used for constant volume. They're just two constants that you can find on the equation sheet were given.

[Olivia Smith 2E]

The values will be different between the two nevertheless. They represent what is being kept constant. They are sort of independent of each other in a sense. Like ice's C doesn't really have a lot to do with liquid water C. There is a relationship there as it is a similar molecule. But in they are going to be different and cannot be changed to equal each other I believe

[Lung Sheng Liang 3J]

The different Cs refer to the different heat capacities of ideal gases under what is held constant. Cp for constant pressure, and Cv for constant volume

[Abraham De Luna]

The main difference is the Cv value is when the volume is constant whereas the Cp value is when the pressure is constant.

[Isabella Cortes 2H]

the difference between Cv and Cp is that Cv is when volume is being held constant and Cp is when pressure is constant. i hope this helps!

[DavidTabib 3H]

Cv is used when the volume is constant and Cp is used when the pressure is constant. The value for Cp and Cv for monotonic molecules are 5/2R and 3/2R, respectively.

[Neha Jonnalagadda 2D]

Cv is when volume is constant and Cp is when pressure is constant.