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14 January, 19:38

A balloon is filled to a volume of 18.9L at a temperature of 27.1ºC. If the pressure in the balloon is measured to be 2.20 atm, how many moles of gas are contained inside the balloon?

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  1. 14 January, 22:14
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    We have 1.69 moles of gas inside the balloon

    Explanation:

    Step 1: Data given

    Volume of the balloon = 18.9 L

    Temperature = 27.1 °C = 300.25 K

    Pressure in the balloon = 2.20 atm

    Step 2: Calculate the number of moles

    p*V = n*R*T

    n = (p*V) / (R*T)

    ⇒with n = the number of moles of gas

    ⇒with p = the pressure of gas = 2.20 atm

    ⇒with V = the volume of the gas = 18.9 L

    ⇒with R = the gas constant = 0.08206 L*atm/mol*K

    ⇒with T = the temperature = 27.1 °C = 300.25 K

    n = (2.20 * 18.9) / (0.08206*300.25)

    n = 1.69moles

    We have 1.69 moles of gas inside the balloon
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