Agas in a cylinder with movable piston has an initial volume of 88.2 ml at 35°c. the cylinder is heated at constant pressure until the volume becomes 123 ml. what was the temperature in degrees celsius to which the gas was heated

The  temperature  in  degree  celsius  to  which  the gas    was  heated  is  calculated  using the Charles  law   formula

that is  V1/T1 =V2/T2
V1=88.2 ml
T1=35 +273 = 308  K
V2=123 ml
T2=?

by  making T2  the formula of the  subject  T2=V2T1/V1

=(123 ml  x308 k)/88.2 ml =429.5 K

in  degree  celsius = 429.5  -273= 156.5  degree celsius

Qand k are only the same when the forward rate of the reaction has reached zero.