Worksheet 02

# Worksheet 02 - 1. Spring 2007 CH 307 Worksheet 2 100 g of...

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Spring 2007 CH 307 Worksheet 2 1. 100 g of ice at -25°C is heated to steam at 125°C. For water, the specific heats are c ice = 2.093 J/g°C, c water = 4.186 J/g°C, and c steam = 2.009 J/g°C. The enthalpy changes are H fusion = -335.5 J/g and H vaporization = 2.26 kJ/g. What is H sys for this process? 2. 1 MJ of heat is dumped into 2 kg of ice at -25°C. What is the final temperature and state (solid, liquid, or gas) of the water? 3. The phase diagram for water (shamelessly borrowed from last year’s quiz 2) is shown above. What phase change(s) occur when going from 1 atm, 100 K to 1 atm, 400K? From 0.1 atm, 100 K to 0.1 atm, 400K? 4. For any temperature less than ~475 K, if you keep increasing the pressure on the system, what will be the eventual state of the system? Is this the same or different from most other substances? 5. Describe the physical state of the system at the point where the three lines meet, and at temperatures above ~475K. 6.

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## This note was uploaded on 05/02/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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Worksheet 02 - 1. Spring 2007 CH 307 Worksheet 2 100 g of...

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