jeidyntorres
jeidyntorres jeidyntorres
  • 03-05-2019
  • Chemistry
contestada

Helium occupies a volume of 3.8 liters at -45 degrees C. What volume will it occupy at 75 degrees C?

Respuesta :

superman1987
superman1987 superman1987
  • 12-05-2019

Answer:

5.8 L.

Explanation:

  • We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

  • If n and P are constant, and have two different values of V and T:

V₁T₂ = V₂T₁

V₁ = 3.8 L, T₁ = - 45.0°C + 273 = 228.0 K.

V₂ = ??? L, T₂ = 75.0°C + 273 = 348.0 K.

∴ V₂ = V₁T₂/T₁ = (3.8 L)(348.0 K)/(228.0 K) = 5.8 L.

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