An ideal gas follows an equation P2V= constant. The volume and temperature of the gas will be V and T. If the gas expands to double its volume then the final temperature of the gas is

P2V =constant      (1)              From PV=nRT⇒P=nRTV              Substitute in (1) ⇒n2R2T2V2V= constant             T2V= constant             T2V=T222V⇒T22=2T2                                                 T2=2T