Question

//

Chemical potential/phases A substance has three phases: gas, liquid, and solid. The chemical potentials of various phases are illustrated below. T (K) 1) For a given temperature, which of the states represents an equilibrium condition? Submit 2) If the substance starts out in state Q and is held at constant temperature, what happens if it is allowed to reach equilibrium? The substance will freeze. The substance will evaporate The substance will melt and evaporate. The substance will sublime. Nothing will happen. Submit Specific heat and equipartition A block of aluminum with initial T-20 °C is placed into liquid nitrogen (T77 K). When the aluminum block has reached the temperature of liquid nitrogen, 14 grams of nitrogen are vaporized. Use a temperature-independent value of 900 J/(kg K) for the specific heat of aluminum. The latent heat of vaporization for liquid nitrogen -2x105 J/kg. 1) What is the mass of the aluminum block? 76.8 g 56.4 g 23.5 g 4.4 g 3.6 g Submit

Answer 1

iguid Nitroteh T-77 K に20 C alumium Eneagy scal ased b nlumium bleck eher