2. (14.13) How long does it take a 750-W coffeepot to bring to a boil 0.75 L of water initially at 11°C? Assume that the part of the pot which is heated with the water is made of 280 g of aluminum, and that no water boils away. 3. (14.14) What will be the equilibrium temperature when a 265-g block of copper at 245°C is placed in a 145-g aluminum calorimeter cup containing 825 g of water at 12.0°C?

2. (14.13) How long does it take a 750-W coffeepot to bring to a boil 0.75 L of water initially at 11°C? Assume that the part of the pot which is heated with the water is made of 280 g of aluminum, and that no water boils away. 3. (14.14) What will be the equilibrium temperature when a 265-g block of copper at 245°C is placed in a 145-g aluminum calorimeter cup containing 825 g of water at 12.0°C?

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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Similar questions

After you pour a cup of coffee, you should wait for it to cool before drinking. -How many grams of coffee must evaporate from 355 g of coffee in a 120-g glass cup to cool the coffee and the cup from 95.0°C to 45.0°C? You may assume the coffee has the same thermal properties as water and its average heat of vaporization is 2340 kJ/kg (560 cal/g). You may neglect the change in mass of the coffee as it cools.
2. A student measures the length of a brass rod at 20.0°C. The reading is 95.00 cm. What will be the length of the rod when the temperature is at: (a) - 15.0°C? (5 pts) (b) 55.0°C? (5 pts)
19.7 A 5 kg aluminium plate at a temperature of 20 °C is brought into thermal contact with a 9 kg steel plate at a temperature of 25 °C. What is the final temperature of both plates (in °C)? [CAL = 910 J kg-1 K-1, csteel = 466 J kg-1 K-1]
19. In a physics experiment, a 0.100 kg aluminum calorimeter cup holding 0.200 kg of ice is removed from the freezer, where both ice and cup have been cooled to -5.00 degrees Celsius. Next, 0.0500 kg of steam at 100 degrees Celsius is added to the ice in the cup. What will be the equilibrium temperature of the system after the ice has melted? (c_aluminum=920 J/kgC, ice melts at 0 degrees Celsius) a. 28.1 degrees Celsius b. 31.4 degrees Celsius c. 33.3 degrees Celsius d. 35.5 degrees Celsius e. None of the above
6. (14.21) A 0.095-kg aluminium sphere is dropped from the roof of a 55-m-high building. If 65% of the thermal energy produced when it hits the ground is absorbed by the sphere, what is its temperature increase? 7. (14.31) Determine the latent heat of fusion of mercury using the following calorimeter data: 1.00 kg of solid Hg at its melting point of -39.0°C is placed in a 0.620-kg aluminum calorimeter with 0.400 kg of water at 12.80°C; the resulting equilibrium temperature is 5.06°C.
5. (14.10) What is the specific heat of a metal substance if 135 kJ of heat needed to raise 4.1 kg of the metal from 18.0°C to 37.2°C? 6. (14.21) A 0.095-kg aluminium sphere is dropped from the roof of a 55-m-high building. If 65% of the thermal energy produced when it hits the ground is absorbed by the sphere, what is its temperature increase?
2. Compare the heat loss from an insulated and an uninsulated copper pipe (k-400 W/m K) under the following conditions. The pipe has an internal diameter of 10 cm and an external diameter of 12 cm. The inside surface temperature of the pipe is at 110°C. The pipe is located in a space where all possible outside surface temperature of material was maintained at 30°C. The insulation available to reduce heat losses is 5 cm thick and its conductivity is 0.20 W/m K. If the furnace for heating the fluid in the pipe operating at an efficiency of 85% using natural gas priced at Cg = Php 1.00/MJ, what is the daily cost of heat loss per meter of pipe?