# A 350 mL sample of air collected at 35°C has a pressure of 550 torr. What pressure will the air exert if it is allowed to expand to 425 mL at 57°C?

##### 1 Answer

#### Explanation:

We can solve this equation using the **combined gas law**:

Remember, *always* use the absolute (Kelvin) temperature when working with gas equations.

The temperature conversions are

Since we're trying to find the final pressure, let's rearrange this equation to solve for

**Our known values**:

Let's plug these into the equation to find the final pressure:

The final pressure after it is subjected to these changes is thus