Question

Calculate the density of water vapor at 350 kPa absolute and 20 °C if its gas constant is 0.462 kPa-m³/kg°K. i

Answer 1

Answer:This may help you

Explanation:

Water density at about 4 degree Celsius is 1000kg/m3 above 100 degrees Celsius it becomes around 958 kg/m3 so that means it is vapor.

But i have been told that the water vapor density is 0.554kg/m3.

Answer 2

Answer:

The density is p = 2.58 Kg/$m^3$

Explanation:

• As we know that by ideal gas equation
  $P V=MRT\\P=\frac{M}{V} RT$
• Now it is known that density =$\frac{M}{V}$
• So according to question P = 350kPa, Temperature = 20 C = 293K and R= 0.462kPa-m³/kg°K
  Putting these values in equation we get
  $350 = p *0.462 *293\\p = 2.58$
• Hence the density is p = 2.58 Kg/$m^3$
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