10 L of a gas at constant pressure is initially at 25°C. If the temperature is increased to 50°C the volume of the gas will

a. increase by about 8%.

b. decrease by about 8%.

c. increase by 100%.

d. decrease by 100%.

e. stay the same.

**Explanation:** We are given the initial volume of gas and initial temperature as well as final temperature and are asked to find final volume. Therefore, we can use V1/T1 = V2/T2 where V1 is the initial volume, T1 is the initial temperature, V2 is the final volume and T2 is the final temperature. Temperature must be in Kelvin. ºC+273 = K

V1= 10L

T1 = 25°C+273 = 298K

V2=?

T2 = 50°C+273 = 323K

__10L __ = __V2__

298K 323K

V2= 10.8L

(10.8/10) *100% = 108.3%

**Answer:** a