Calculate the pressure in atm, if 0.00825 moles occupies 174 mL at - 15 celcius.

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Chemistry

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6 July, 03:30

Calculate the pressure in atm, if 0.00825 moles occupies 174 mL at - 15 celcius.

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Maia Fry · Answer 1

Answer is: the pressure is 1.12 atm.

n (O₂) = 0.00825 mol, amount of substance.

V = 174 mL : 1000 mL/L = 0.174 L, volume of gas.

T = 15°C = 288.15 K; temperature.

R = 0.08206 L·atm/mol·K, universal gas constant.

Ideal gas law: p·V = n·R·T.

p = n·R·T / V.

p = 0.00825 mol · 0.08206 L·atm/mol·K · 288.15 K / 0.174 L.

p = 1.12 atm.