consider a horizontal cylindrical tube of cross sectional area A fitted with two frictionless pistons. The piston are connected to each other by an inextensible wire. Initially, the temperature of the gas is To and its pressure is Po which equals the atmospheric pressure. Find the tension in the wire if the temperature is raised to 3To. my attempt.. since the pressure is constant.. what i tried to do was assume the volume to be constant.. so if the volume was constant, pressure developed would be.. (P1)V = nRTo (P2)(V) = nR(3To) or, P2 = 3P1 so, the force on each cross section = (3Po.A) so this must be the tension in the wire.. but the answer says its (2Po.A).. which definitely needs to be correct.. so where m i wrong??? please suggest. Thanks in advance..!!