An open vessel at 270 C is heated until two-fifth of the air (assumed as an ideal gas ) in it has escaped from the vessel. Assuming that the volume of the vessel remains constant, the temperature at which the vessel has been heated is : (in K)
As we have learned in the gaseous state,
we know 2/5 air escaped from the vessel, 3/5 air remains in the vessel.
P, V constant,