# A gas occupies 3 litres at 0°C. what volume will it occupy at -20°C, assuming pressure remaining constant?

##### 1 Answer

Nov 22, 2017

2.78 litres

#### Explanation:

If you treat it as an ideal gas, then

If you assume pressure is constant, and we know that the amount of substance will remain constant, and of course the gas constant is a constant, then

Now plug in the numbers: