Question

Under what conditions will a pure sample of ideal gas not
only exhibit a pressure of 1 atm, but also a concentration of
2 moles per litre?
(a) At STP
(b) When volume is 22.41litre
(c) At 6.1 K
(d) When R has no unit

Answer 1

Under what conditions will a pure sample of ideal gas not

only exhibit a pressure of 1 atm, but also a concentration of

2 moles per litre?

(a) At STP

(b) When volume is 22.41litre

(c) At 6.1 K

(d) When R has no unit

Answer 2

A pure sample of ideal gas will not only exhibit a pressure of 1 atm, but also a concentration of 2 moles per litre at a temperature of 6.1K

• For an ideal gas, PV= nRT ⇒ T= P/((n/V)×R)
• Given P=1 atm and (n/V) = 2 moles per litre , R= 0.0821 atm.L/(mole.K)
• T= 1/(2×0.0821) = 6.1K.
• Therefore, an ideal gas will satisfy both the conditions of having a pressure of 1 atm and a concentration of 2 moles per litre only when the temperature at which it is kept is equal to 6.1K