25 points
How many moles are contained in 5.00 Liters, of a gas at 225 kPa and a
temperature of 75.0 degrees Celsius. Use 8.314 for R

n = 0.39 mol

Explanation:

Given data:

Number of moles = ?

Volume = 5 L (5/1000 = 0.005 m³)

Pressure = 225 Kpa (225×1000 = 225000 Nm⁻²)

Temperature = 75°C (75+273.15 = 348.15 K)

R = 8.314  Nm K⁻¹ mol⁻¹

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant

T = temperature in kelvin

n = PV/RT

n = 225000 Nm⁻² ×0.005 m³/ 8.314  Nm K⁻¹ mol⁻¹ ×348.15 K

n = 1125 /2894.52 / mol

n = 0.39 mol

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