2 pistons are connected like in the picture. I know the area of the big cylinder is 100 cm2cm2 while the one of the small cylinder is 50 cm2 and that the pistons are tied by a rigid wire. There is air in both cylinders, initially having 27°C and normal pressure. The air in the smaller cylinder is heated, it's temperature increasing by 50°C. How much does the temperature of the air in the large cylinder need to increase so that the 2 pistons don't move ?