Problem 1: pdf (167 KEB) Page of 3 above. Late homework is not accepted, so if y

Question

Problem 1:

pdf (167 KEB) Page of 3 above. Late homework is not accepted, so if you can't make it to lecture on the given due date, please make arrangements with me well in advance of the homework deadline. Problem 1: The triple point of water is at a temperature of 0 C and at a pressure of 612 Pa. Using the phase diagram from the locture notes, answer the following questions: (a) Will water be ice, liquid water, or steam at 612 Pa and -10 °c? b) Will water be ice, liquid water, or steam at 500 Pa and 00? (c) Supposc I begin with water at 612 Pa and 15 C, and then increase the pressure while holding temperature constant. What phasc transition will I sce? (d) Suppose I begin with water at 612 Pa and -10 C, and then decrcase the pressure while holding temperature constant. What phase transition will I sec? Problem 2: The latent heat of vaporization of water is 539 calories per gram, and the latent heat of fusion of water is 80 calorics per gram. How much heat is required to turn a 400 g block of ice completely into steam? Assume the ice begins at 00 C. (Hint: there are three steps in this calculation, and you will nced tho equation Q = crnT for one of them) Problem 3: You are sitting in a coffee shop again, and overhear a frustrated physics student: "In class we learned that as ice melts into water, the temperature of the ice water remains at 0 °C. This means that the speed of the molccules remains the same, even though we are adding energy. Doesn't this violate conservation of energy? If I add energy to the ice water and the tem-

Explanation / Answer

a) Ice

b) Steam

c) Steam to liquid

d) Ice to steam

all the above answer can be answered from the given diagram in the question .

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