ASK YOUR TEACH A new liquid substance has been discovered that freezes at 44°C and has a latent heat of 471,000 3/kg when freezing. A scientist poured the liquid (which was at 44C) into a 0.711 kg cup (Coup=924 3/kg-K) which caused some, but not all, of the liquid to freeze. As a result, the liquid lost 67,000 3 of heat until thermal equilibrium was reached Determine how much of the liquid froze & the initial temperature of the cup. mfreezes Teup, °℃ MY NOTES

ASK YOUR TEACH A new liquid substance has been discovered that freezes at 44°C and has a latent heat of 471,000 3/kg when freezing. A scientist poured the liquid (which was at 44C) into a 0.711 kg cup (Coup=924 3/kg-K) which caused some, but not all, of the liquid to freeze. As a result, the liquid lost 67,000 3 of heat until thermal equilibrium was reached Determine how much of the liquid froze & the initial temperature of the cup. mfreezes Teup, °℃ MY NOTES

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter10: Thermal Physics

Section: Chapter Questions

Problem 7WUE: One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at...

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A 1.00-kg block of copper at 20.0C is dropped into a large vessel of liquid nitrogen at 77.3 K. How many kilograms of nitrogen boil away by the time the copper reaches 77.3 K? (The specific heat of copper is 0.092 4 cal/g C, and the latent heat of vaporization of nitrogen is 48.0 cal/g.)
A high-end gas stove usually has at least one burner rated at 14 000 Btu/h. (a) If you place a 0.25-kg aluminum pot containing 2.0 liters of water at 20.C on this burner, how long will it take to bring the water to a boil, assuming all the heat from the burner goes into the pot? (b) Once boiling begins how much time is required to boil all the water out of the pot?
One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 106 Ha at 25.0C is allowed to expand to 3.00 times its original volume, its final pressure is 1.07 106 Pa. (a) What is the initial temperature of the gas in Kelvin? (b) What is the final temperature of the system? (See Section 10.4.)
Beryllium has roughly one-half the specific heat of water (H2O). Rank the quantities of energy input required to produce the following changes from the largest to the smallest. In your ranking, note any cases of equality, (a) raising the temperature of 1 kg of H2O from 20C to 26C (b) raising the temperature of 2 kg of H2O from 20C to 23C (c) raising the temperature of 2 kg of H2O from 1C to 4C (d) raising the temperature of 2 kg of beryllium from 1C to 2C (e) raising the temperature of 2 kg of H2O from -1C to 2C
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