Body temperature is about 309 K. On a cold day, what volume of air at 264 K must a person with a lung capacity of 2.5 L breathe in to fill the lungs?
A) 2.93 L
B) 2.14 L
C) 2.31 L
D) 4.27 L
E) none of these

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm