# If a gas sample has a pressure of 30.7 kPa at 0.00°C, by how much does the temperature have to decrease to lower the pressure to 28.4 kPa?

##### 1 Answer

Mar 16, 2016

#### Answer:

#### Explanation:

In this question I assume that the volume is unchanged and therefore, we can use the following law:

Then,

Therefore, the temperature should be lowered to:

#=> color(blue)(T_2 = -20.5^@"C")# to 3 sig figs.