The Lid That Cooks Faster - boiling point, pressure cookers, tyres and taps

That board’s loop crashes the pressure so its refrigerant boils far below freezing. A pressure cooker does the opposite: it raises the pressure so water boils far above 100 °C.

Before you start. You need one idea from Cold Is a Lie - fridge, AC, heat pump: a liquid’s boiling point is not fixed. Squeeze it and it boils hotter; let the pressure crash and it boils cold. That is how a fridge’s refrigerant boils at −25 °C. This lesson takes the same idea into the kitchen, then out to your tyres and your tap.