17-2) Suppose an experiment was conducted in which a solid block of subzero ice
ID: 2000782 • Letter: 1
Question
17-2) Suppose an experiment was conducted in which a solid block of subzero ice was placed in a thermally insulated container and heated at a constant rate from a temperature of -25oC to a temperature greater than 100oC. You should interpret the following graph of ideal experimental data. (A graph of real data would show scatter due to experimental uncertainties and deviations from constant and uniform heating.)
(a) Explain what is happening to the ice during each of the segments, A through D, of the graph. For example, a good answer for part (a) is: in segment A the temperature of the solid block of ice is increasing linearly with time from -25oC to 0oC during a two minute span of time. No ice has melted.
(b) Look carefully at segment E. What do you think could be happening to the H2O during that time?
?(c) What would happen after the 18 minute period if the container were open to the atmosphere rather than insulated?
Explanation / Answer
B (2 min): the block is menting (to changes in the temp)
C: the formed water increases its temp (4 min)
D: the water is boiling and passes into vapours (8 min)
E (2 min): the temp of the vapours increases with temp (and the pressure also!).
(c) A kind of explosion...
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