}} \text { 3. } \mathrm{T}_{\text {at }} \text { of a pure substance decreases as pressure increases. } \text { 4. The internal energy of a pure substance increases during the vaporization process. } 5. At a given pressure, the temperature of the superheated vapor is higher than the saturation temperature of the pure substance.T 6. The pressure for superheated R-134a at 13°C with v = 0.3 m³/kg is_____КРа. 7. Assume nitrogen to be an ideal gas. The specific volume at 300 kPa and 220° C_____ is 8. The saturation pressure of R-134a at -20 °C is_____КРа. 9. The critical pressure and temperature of H2O are___and_____respectively. The latent heat of vaporization of 3-kg of saturated liquid water at 300 kPa is_____kJ.
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