A sample of helium gas at 841 mmHg and 14.7°C is heated to 84.7°C at constant volume. Calculate its final pressure (in atm). atm. Do NOT enter unit. Report your final answer with 3 SFs.

1.38

Explanation:

Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

    (At constant volume and number of moles)

where,

= initial pressure of gas  = 841 mm Hg

= final pressure of gas  = ?

= initial temperature of gas  =  

= final temperature of gas =  

   ( 760 mm Hg = 1atm )

Thus the final pressure is 1.38

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