Let C V and C P denote the molar heat capacities of an ideal gas at constant volume and constant pressure respectively. Which of the following is a universal constant?

Question

Philoid · Accepted Answer

For an ideal gas, C_p - C_v = R.

Here, R is the universal gas constant.

Hence, the correct option is (c).

Option (a) is incorrect since C_p/C_v = ℽ, which differs for monoatomic, diatomic or polyatomic gases. Here ℽ = ratio of molar heat capacities at constant pressure and constant volume.

Option (b) is incorrect since C_pC_v = ℽC_v², which is not a constant as ℽ varies.

Option (d) is incorrect since C_p + C_v = (ℽ+1)C_v, which is not a constant as ℽ varies.

Let CV and CP denote the molar heat capacities of an ideal gas at constant volume and constant pressure respectively. Which of the following is a universal constant?

Let C_V and C_P denote the molar heat capacities of an ideal gas at constant volume and constant pressure respectively. Which of the following is a universal constant?