•30 A 0.400 kg sample is placed in a cooling apparatus that re- moves energy as heat at a con- stant rate. Figure 18-33 gives the temperature T of the sam- ple versus time t; the horizon- tal scale is set by t,= 80.0 min. The sample freezes during the energy removal. The specific heat of the sample in its initial liquid phase is 3000 J/kg K. What are (a) the sample's heat of fusion and (b) its specific heat in the frozen phase? 300 270 250 t (min) Figure 18-33 Problem 30. T (K)

•30 A 0.400 kg sample is placed in a cooling apparatus that re- moves energy as heat at a con- stant rate. Figure 18-33 gives the temperature T of the sam- ple versus time t; the horizon- tal scale is set by t,= 80.0 min. The sample freezes during the energy removal. The specific heat of the sample in its initial liquid phase is 3000 J/kg K. What are (a) the sample's heat of fusion and (b) its specific heat in the frozen phase? 300 270 250 t (min) Figure 18-33 Problem 30. T (K)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

•30 A 0.400 kg sample is placed in a cooling apparatus that re-
moves energy as heat at a con-
stant rate. Figure 18-33 gives
the temperature T of the sam-
ple versus time t; the horizon-
tal scale is set by t,= 80.0 min.
The sample freezes during the
energy removal. The specific
heat of the sample in its initial
liquid phase is 3000 J/kg K.
What are (a) the sample's heat
of fusion and (b) its specific
heat in the frozen phase?
300
270
250
t (min)
Figure 18-33 Problem 30.
T (K)

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