Question

A sample of oxygen at 40 °C occupies 820 mL at some unknown pressure. If this sample later occupies 1250 mL at 60 °C and 1.40 atm, what was its original unknown pressure?

Answer 1

Let the original pressure be $P_0$

Hence,

$P_0(273) = 547.75$

$P_0 = 2.01atm$