# A hot air balloon has a volume of 500.0 L. At what temperature is the gas if there are 25 moles present at standard pressure?

##### 1 Answer

Apr 21, 2016

24 K

#### Explanation:

V = 500 ml , n = 25 moles , R = 0.0821 L atm /K mol, T = ? , P = 0.98 atm

PV = nRT , rearranging it , we will get T = PV/nR

substituting the values,

T = 0.98 atm x 0.5 L / 25 mol x 0.0821 L atm /K mol

T = 0.49 K / 2.05

T = 24 K