# A container containing 5.00 L of a gas is collected at 100 K and then allowed to expand to 20.0 L. What must the new temperature be in order to maintain the same pressure?

##### 1 Answer

Apr 3, 2017

400 Kelvin (K).

#### Explanation:

We are given the initial volume and initial temperature (in Kelvins, so no need to convert from Celsius to Kelvin). We are also given the final volume.

In short, we have:

If you know your gas laws, use Charles' Law to help you solve this problem.

Charles' Law:

We have 3 of the 4 variables, and if we fill those in, we have...

Using the algebra skill of cross multiplying, we can get...

5.00

Dividing both sides by 5.00 to isolate the

It is 400. due to the significant figure rule.