During a chemistry lab, you take a 0.4 kg sample of ice and put it in a beaker with a thermometer. You then place the beaker with the ice on a hot plate, and turn on the hot plate. This hot plate adds heat to the ice at a rate of 330 W. At time t=0 the temperature of the ice is -18 °C. Because of the large heat capacity of water and ice, you may assume in this problem that all the heat goes into the sample of ice, and that we can ignore the amount of heat going into the beaker and thermometer. Also assume no heat escapes from the system. Some useful values: • Specific heat of water: Cw = 4200 J/kg K • Specific heat of ice: c; = 2100 J/kg K • Latent heat of fusion: L = 334 000 J/kg 1a) At what time does the ice reach a temperature of -3.5°C? answer= units? 1b) At what time has all the ice melted? answer= units? Check your answer Check your answer 1c) After the ice has completely melted, we're left with 0.4 kg of water. Check your answer answer= units? not yet solved not yet solved Show solution Show solution At what time does the water reach a temperature of 39°C? not yet solved Show solution

During a chemistry lab, you take a 0.4 kg sample of ice and put it in a beaker with a thermometer. You then place the beaker with the ice on a hot plate, and turn on the hot plate. This hot plate adds heat to the ice at a rate of 330 W. At time t=0 the temperature of the ice is -18 °C. Because of the large heat capacity of water and ice, you may assume in this problem that all the heat goes into the sample of ice, and that we can ignore the amount of heat going into the beaker and thermometer. Also assume no heat escapes from the system. Some useful values: • Specific heat of water: Cw = 4200 J/kg K • Specific heat of ice: c; = 2100 J/kg K • Latent heat of fusion: L = 334 000 J/kg 1a) At what time does the ice reach a temperature of -3.5°C? answer= units? 1b) At what time has all the ice melted? answer= units? Check your answer Check your answer 1c) After the ice has completely melted, we're left with 0.4 kg of water. Check your answer answer= units? not yet solved not yet solved Show solution Show solution At what time does the water reach a temperature of 39°C? not yet solved Show solution

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

During a chemistry lab, you take a 0.4 kg sample of ice and put it in a beaker with a thermometer. You then place the beaker with the ice on
0 the temperature of the ice is -18
=
a hot plate, and turn on the hot plate. This hot plate adds heat to the ice at a rate of 330 W. At time t
°C.
Because of the large heat capacity of water and ice, you may assume in this problem that all the heat goes into the sample of ice, and that
we can ignore the amount of heat going into the beaker and thermometer. Also assume no heat escapes from the system.
Some useful values:
●
Specific heat of water: C =
Specific heat of ice: Ci
= 2100 J/kg K
• Latent heat of fusion: L = 334 000 J/kg
●
4200 J/kg K
=
1a) At what time does the ice reach a temperature of -3.5°C?
answer=
units?
1b) At what time has all the ice melted?
answer=
units?
Check your answer
Check your answer
1c) After the ice has completely melted, we're left with 0.4 kg of water.
Check your answer
answer=
units?
not yet solved
not yet solved
Show solution
Show solution
At what time does the water reach a temperature of 39°C?
not yet solved
Show solution

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