1. (a) How much heat transfer is necessary to raise the temperature of a 0.26 -kg piece of ice from -20 °C to 130 °C, including the 20 kJ/s energy needed for phase changes? Specific heat of ice = 2.090 kJ/kg °C Specific heat of water = 4.186 kJ/kg °C Specific heat of steam = 1.520 kJ/kg °C Heat of fusion of water = 334 kJ/kg Heat of vaporization = 2256 kJ/kg (i) Heat needed to warm ice to 0 °C: Q₁: kJ (ii) Heat needed to melt ice at 0 °C: Q₂: kJ (iii) Heat required to warm 0 °C water to 100 °C: Q3: kJ (iv) Heat required to vaporize water at 100 °C: Q4: KJ (v) Heat required to warm 100 °C vapor to 130 °C: kJ Q5: Total heat, Q: kJ (b) How much time is required for the entire process, assuming a constant 20.0 kJ/s rate of heat transfer? Total time, t: ✔S

1. (a) How much heat transfer is necessary to raise the temperature of a 0.26 -kg piece of ice from -20 °C to 130 °C, including the 20 kJ/s energy needed for phase changes? Specific heat of ice = 2.090 kJ/kg °C Specific heat of water = 4.186 kJ/kg °C Specific heat of steam = 1.520 kJ/kg °C Heat of fusion of water = 334 kJ/kg Heat of vaporization = 2256 kJ/kg (i) Heat needed to warm ice to 0 °C: Q₁: kJ (ii) Heat needed to melt ice at 0 °C: Q₂: kJ (iii) Heat required to warm 0 °C water to 100 °C: Q3: kJ (iv) Heat required to vaporize water at 100 °C: Q4: KJ (v) Heat required to warm 100 °C vapor to 130 °C: kJ Q5: Total heat, Q: kJ (b) How much time is required for the entire process, assuming a constant 20.0 kJ/s rate of heat transfer? Total time, t: ✔S

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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Concept explainers

Calorimetry

Measuring the heat transferred during chemical reactions or other physical processes is known as calorimetry. It comes under the branch of thermochemistry.

Question

100%

1. (a) How much heat transfer is necessary to raise the temperature of a 0.26 -kg piece of ice
from -20 °C to 130 °C, including the 20 kJ/s energy needed for phase changes?
Specific heat of ice = 2.090 kJ/kg °C
Specific heat of water = 4.186 kJ/kg °C
Specific heat of steam = 1.520 kJ/kg °C
Heat of fusion of water = 334 kJ/kg
Heat of vaporization = 2256 kJ/kg
(i) Heat needed to warm ice to 0 °C:
Q₁:
✔KJ
(ii) Heat needed to melt ice at 0 °C:
Q₂:
KJ
(iii) Heat required to warm 0 °C water to 100 °C:
Q3:
KJ
(iv) Heat required to vaporize water at 100 °C:
Q4:
KJ
(v) Heat required to warm 100 °C vapor to 130 °C:
Q5:
KJ
Total heat, Q:
KJ
(b) How much time is required for the entire process, assuming a constant 20.0 kJ/s rate of
heat transfer?
Total time, t:
S

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