Question

2. After contracting, a gas occupies 7.8 L at 100 K, calculate its initial volume if the starting temperature was 435 K.

Answer 1

1) List the known and unknown values

Final conditions

Volume: 7.8 L

Temperature: 100 K

Initial conditions

Temperature: 435 K

Unknown

Volume:

2) set the equation

Charles' law

$\frac{V1}{T1}=\frac{V2}{T2}$

3) Plug in the known values

$\frac{V1}{435K}=\frac{7.8L}{100K}$$V1=\frac{7.8\text{ }L}{100\text{ }K}*435\text{ }K=33.93\text{ }L$