STG 330 Chapter 3

If 10kg of water are in a rigid tank and 8 kg are in the liquid phase with the rest being in the vapor phase, the water is...

• Subcooled

• Saturated

• Superheated

• Frozen

If 10kg of water are in a rigid tank and 8 kg are in the liquid phase with the rest being in the vapor phase, the quality is...

• 0.8

• 10

• 0.2

• undefined

If the enthalpy of vaporization for water at a given pressure and temperature is  $h_{fg}$   = 2257.5 kJ/kg, how much energy is needed to vaporize 2kg?

• 2258 kJ/kg

• 4515 kJ

• 4515 kJ/kg

• 1129 kJ

Tags

NGSS.HS-PS3-4

If tables are unavailable, one can use the Ideal Liquids Law to calculate the saturation properties.

• True

• False

Why are all the properties in the table per unit mass?