The air inside a pasteurizer chamber has the purpose of heating up the food cans at (T_c,o) to kill any germs inside. This air enters at (T_Apc,i) and exits the pasteurizer chamber at (T_Apc,o), which is not insulated and loses heat to the surroundings at (T_s). Choose from the list below the correct energy balance for the temperature of the air exiting the pasteurizer chamber.

(1) VpcCvdtdTApc,0(t)=fa,i(t)CpTApc,i(t)fa,o(t)CpTApc,o(t)hA(TApc,o(t)Tc,o(t))UA(TApc,o(t)TS(t)c] (2) VpcCvdtdTApc,0(t)=fa,i(t)CpTApc,i(t)fa,o(t)CpTApc,o(t)UA(TApc,o(t)TS(t)) (3) VpcCvdtdTApci(t)=fa,i(t)CpTApc,i(t)fa,o(t)CpTApc,o(t)hA(TApc,i(t)TC,o(t))UA(TApc,i(t)TS(t)) (4) VpcCvdtdTApco(t)=fa,i(t)CpTApci(t)+ffci(t)CpTfci(t)fa,o(t)CpTApc,o(t)ffc,o(t)CpTTco(t) UA(TApc,o(t)TS(t))