3) a) A Pyrex baking dish with a mass of 545g warms up by 96.7 °C w hen it absorbs 30.9 k of heat from an oven. What is the specific heat capacity of the dish inJ/goc? T (919) (Te 32 3 2 Tc 110.922 b) If 7.5 kg of ice at 0°C is put into an icebox, how many joules of heat are absorbed from the other items in the icebox as the ice melts? (For H2O, ΔΕυ,-If = 334.7 J/g & ΔΗνα,-L, = 2259.4 J/g) c) How much energy Joules) is required to boil off 1 gallon (3786g) of water that starts out at 21.5°C? (See pt. b above for useful constant.) 1gて378(z liters 17-4.139

3) a) A Pyrex baking dish with a mass of 545g warms up by 96.7 °C w hen it absorbs 30.9 k of heat from an oven. What is the specific heat capacity of the dish inJ/goc? T (919) (Te 32 3 2 Tc 110.922 b) If 7.5 kg of ice at 0°C is put into an icebox, how many joules of heat are absorbed from the other items in the icebox as the ice melts? (For H2O, ΔΕυ,-If = 334.7 J/g & ΔΗνα,-L, = 2259.4 J/g) c) How much energy Joules) is required to boil off 1 gallon (3786g) of water that starts out at 21.5°C? (See pt. b above for useful constant.) 1gて378(z liters 17-4.139

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)...

See similar textbooks

Similar questions

a) A house walls that are 11 cm thick and have an average thermal conductivity four times that of glass wool. Assume there are no windows or doors. The walls’ surface area is 850000 cm2 and their inside surface is at 18°C, while their outside surface is at 7°C. (Thermal conductivity of glass wool is 0.042 W/m°C) (i) Calculate the rate of heat conduction through house walls? Answer for part 1 (ii) How many 150W room heaters would be needed to balance the heat transfer due to conduction? (approximate number) Answer for part 2 b) A spherical infrared heater of radius 5.1 cm has an emissivity of 0.8. What temperature must it run at if the required power is 0.56 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm-2K-4) The temperature of the heater in Celsius =
a) A house walls that are 13 cm thick and have an average thermal conductivity three times that of cork. Assume there are no windows or doors. The walls’ surface area is 900000 cm2 and their inside surface is at 18°C°C, while their outside surface is at 5°C°C. (Thermal conductivity of cork is 0.042 W/m°C) (i) Calculate the rate of heat conduction through house walls? (ii) How many 200W room heaters would be needed to balance the heat transfer due to conduction? (approximate number)
If the R-value of a wall is 10 ft2-°F-hr/Btu, then the rate of heat transfer through a 2 ft x 3 ft section of wall with a temperature difference between the inside and outside of 50°F, will be: 3000 Btu/hr 10 Btu/hr 10,000 Btu/hr 500 Btu/hr 30 Btu/hr OO Next
Review | Seals may cool themselves by using thermal windows, patches on their bodies with much higher than average surface temperature. Suppose a seal has a 0.030 m? thermal window at a temperature of 30° C.(Figure 1) Part A If the seal's surroundings are a frosty -18 °C, what is the net rate of energy loss by radiation? Assume an emissivity equal to that of a human. Express your answer in watts. ? Qnet W At Submit Request Answer Figure < 1 of 1 < Return to Assignment Provide Feedback 33.0 C 30 25 20 15 62 min 1.5°C
a) A house walls that are 16 cm thick and have an average thermal conductivity three times that of cork. Assume there are no windows or doors. The walls' surface area is 1450000 cm² and their inside surface is at 18 °C, while their outside surface is at 4°C. (Thermal conductivity of cork is 0.042 W/m°C) (1) Calculate the rate of heat conduction through house walls? (ii) How many 200oW room heaters would be needed to balance the heat transfer due to conduction? (approximate number) b) A spherical infrared heater of radius 6.2 cm has an emissivity of 0.71. What temperature must it run at if the required power is 0.5 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm- 2K-4) The temperature of the heater in Celsius =
19. The following fission reaction (shown below) occurs in a nuclear power plant. There are 1.50 x 1016 uranium-235 atoms that are simultaneously undergoing this reaction. The uranium is surrounded by 17.5 kg of heavy water, which has a specific heat capacity of 4.70 x 10³ J/kg °C. If 90% of the energy released in the nuclear reactions is absorbed as thermal energy by the heavy water, determine the increase in temperature of he heavy water. ✔✔✔✔ 235U+n→ Zr + 139 Te + 3(n) 92 40 52 mzr-94 = 93.906 u MTe-139 = 138.935 u Mu-235 = 235.044 u
*70. Go When it rains, water vapor in the air condenses into liquid water, and energy is released. (a) How much energy is released when 0.0254 m (one inch) of rain falls over an area of 2.59 X 10° m² (one square mile)? (b) If the average energy needed to heat one home for a year is 1.50 X 10" J, how many homes could be heated for a year with the energy determined in part (a)?
2. In an experimental set-up, 5 kg of salt solution is heated in a glass vessel by a 159 W power gas burner. The internal energy of the solution is to be increased from 90 kJ/kg to 178 kJ/kg for a certain amount of time. An electric stirrer is used to ensure uniform heating of solutions, the power consumption of the stirrer is 30w. The rate of heat loss from the vessel 50o W. How many minutes was the solution heated if the motor is 80% efficient?
What is the ratio of the energy required to warm 125 g of Ice (0.0 \deg C) to body temperature (37 \deg C) to warming the same amount of water through the same temperature change? Answer format is the number Eice/Ewater = (2 significant figures) Latent Heat of Fusion of Water: 335, 000 J/kg Specific Heat Capacity of Water: 4186 J/kg/\deg C
a) A house walls that are 20 cm thick and have an average thermal conductivity four times that of glass wool. Assume there are no windows or doors. The walls' surface area is 1000000 cm² and their inside surface is at 23° Çwhile their outside surface is at 4° C (Thermal conductivity of glass wool is 0.042 W/m°C) (i) Calculate the rate of heat conduction through house walls? (ii) How many 150W room heaters would be needed to balance the heat transfer due to conduction? (approximate number) b) A spherical infrared heater of radius 6.05 cm has an emissivity of 0.74. What temperature must it run at if the required power is 0.42 kW? Neglect the temperature of the environment. (Stefan's constant = 5.67*10-8 Wm¯-2K-4) The temperature of the heater in Celsius =