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
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