193.38 K was the initial temperature of the krypton.
Explanation:
Data given:
Initial volume of the krypton gas = 6 litres
initial pressure of the krypton gas = 0.960 atm
initial temperature of the krypton gas = ?
final volume of the krypton gas = 7.70 litres
final pressure of the Krypton gas = 1.25 atm
final temperature of the krypton gas = 55 degrees or 273.25+55 = 323.15 K
Applying the Combined Gas Laws:
[tex]\frac{P1V1}{T1} = \frac{P2V2}{T2}[/tex]
Rearranging the equation:
T1 = [tex]\frac{P1V1T2}{P2V2}[/tex]
Putting the value in the equation:
T1 = [tex]\frac{0.960 X 6 X 323.15}{1.25 X 7.70}[/tex]
T1 = 193.38 K
Initial temperature of the krypton gas is 193.78 K
