Two cylinders A and B are connected by a tube of negligible volume, as shown in
 Fig. 2.1.
 
 Initially, tap T is closed. The cylinders contain an ideal gas at different pressures.
 
 
 Cylinder A has a constant volume of 2.5 × 10³ cm³ and contains gas at pressure
 3.4 x 105 Pa and temperature 300 K.
 Show that cylinder A contains 0.34 mol of gas.
 
 
 Cylinder B has a constant volume of 1.6 x 10³ cm³ and contains 0.20 mol of gas
 When tap T is opened, the pressure of the gas in both cylinders is 3.9 × 105 Pascal
 No thermal energy enters or leaves the gas.
 Determine the final temperature of the gas.