Chemistry gas law help?

I need help with this: An 805 mL sample of gas is collected at 382 mm Hg and 273C . what volume would the sample occupy at stp? And can you please put a step by step how to do it so i can understand it please and thankyou.

1 Answer

Relevance
  • Lexi R
    Lv 7
    9 years ago
    Favorite Answer

    STP is standard temperature and pressure, which is 0 deg celcius (273 Kelvin) and 1 atm (760 mmHg)

    Use the combined gas equation

    P1V1 / T1 = P2V2 / T2

    P1 = initial pressure = 382 mmHg

    V1 = initial volume = 805 ml

    T1 = initial temp = 273 deg C = 273 deg C + 273 = 546 K

    P2 = final pressure = 760 mmHg

    V2 = final volume = ? ml

    T2 = final temperature = 273 K

    solve for V2

    V2 = P1V1T2 / (P2T1)

    = 382 mmHg x 805 ml x 273 K / (760 mmHg x 546 K)

    = 202 ml

Still have questions? Get your answers by asking now.