A 5.45 L sample at 10.0°C and a pressure of 64.7 kPa is allowed to expand to a volume of 18.50L. The final pressure of the gas is 58.0 kPa. What is the final temperature of the gas in degrees Celsius?

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

where,

= initial pressure of gas = 64.7 kPa

= final pressure of gas = 50.8 kPa

= initial volume of gas = 5.45 L

= final volume of gas = 18.50 L

= initial temperature of gas =

= final temperature of gas = ?

Now put all the given values in the above equation, we get:

Thus final temperature of the gas in degrees Celsius is 481

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