A 283 g silver figure of a polar bear is dropped into the 249 g aluminum cup of a well-insulated calorimeter containing 265 g o liquid water at 20.9°C. The bear's initial temperature is 98.5°C. What is the final temperature of the water, cup, and bear when they reach thermal equilibrium? The specific heats of silver, aluminum, and liquid water are, respectively, 234 J/ (kg-K), 910 J/ (kg-K), and 4190 J/ (kg-K). final temperature:

A 283 g silver figure of a polar bear is dropped into the 249 g aluminum cup of a well-insulated calorimeter containing 265 g o liquid water at 20.9°C. The bear's initial temperature is 98.5°C. What is the final temperature of the water, cup, and bear when they reach thermal equilibrium? The specific heats of silver, aluminum, and liquid water are, respectively, 234 J/ (kg-K), 910 J/ (kg-K), and 4190 J/ (kg-K). final temperature:

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 95P: (a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a I...

See similar textbooks

Similar questions

The thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about 0.20 W/m K and 0.020 W/m K, respectively, while other tissues inside the body have conductivities of about 0.50 W/m K. Assume that between the core region of the body and the skin sin face lies a skin layer of 1.0 mm, fat layer of 0.50 cm, and 3.2 cm of other tissues. (a) Find the R-factor for each of these layers, and the equivalent R-factor for all layers taken together, retaining two digits. (b) Find the rate of energy loss when the core temperature is 37C and the exterior temperature is 0C. Assume that both a protective layer of clothing and an insulating layer of unmoving air a absent, and a body area of 2.0 m2.
(a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a I .40-m surface area? Assume that the animal's skin temperature is 32.0 , that the air temperature is 5.00 , and that has the same thermal conductivity as air. (b) What food intake will the animal need in one day to replace this heat transfer?
At high noon, the Sun delivers 1 000 W to each square meter of a blacktop road. If the hot asphalt transfers energy only by radiation, what is its steady-state temperature?
(a) The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram ale there in a 5.00-g peanut if the energy from burning it is transferred to 0. 500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9- temperature increase? Assume the process takes place in an ideal calorimeter, in other words a perfectly insulated container. (b) Compare your answer to the following labeling information found on a package of dry roasted peanuts: a sewing of 33 g contains 200 calories. Comment on whether the values are consistent.
Digestingfat produces 9.3 food calories per gram of fat, and typically 80%of this energy goes to heat when metabolized. (One food calorie is1000 calories and therefore equals 4186 J.) The body then movesall this heat to the surface by a combination of thermal conductivityand motion of the blood. The internal temperature of the body(where digestion occurs) is normally 37C, and the surface is usuallyabout 30C. By how much do the digestion and metabolism of a2.50 g pat of butter change your body’s entropy? Does it increase ordecrease?
A 200g copper bowl contains 100 g of wate, both at 25 degrees celsius. A very hot 300 g copper cylinder is dropped into the water. The final temperature of the system is 100 degrees celsius. Neglect energy transfer with the environment. The specific heat of water = 4186 J/kg. K and that of copper = 386J/kg. K. How much energy is transferred to the copper bowl as heat?
A 50.0 g ice cube, intially at 0° C, is dropped into a Styrofoam cup containing 350 g of water, intially at 20.0° C. What is the final temperature of the water, if no heat is transferred to the styrofoam or the Surroundings?
A 450 g metal cube which is originally at 110 degree(s) C oven is dropped into 0.003 m3 of water in a at 70 degrees Celcuis in an insulated cup. After both water and cube reached thermal equilibrium, the final temp is 78 degrees Celsius. What is the specific heat capacity of the uknown metal cube? cWater= 4200 j/kgK cCube=? A. 2800 j/kgk B. 7000 j/kgk C. 6500 j/kgk D. 5100 j/kgk E. None
A laboratory technician drops a 0.0850 kg sample of unknownsolid material, at 100.0°C, into a calorimeter. The calorimeter can, initiallyat 19.0°C, is made of 0.150 kg of copper and contains 0.200 kgof water. The final temperature of the calorimeter can and contents is26.1°C. Compute the specific heat of the sample.
A cube of ice is taken from the freezer at -8.4°C and placed in a 94 g zinc cup filled with 307 g of water. Both the water & the cup are at 20.1°C. Eventually the system reaches thermal equilibrium at 18.4°C. Determine Qcup Qwater (for the water initially in the cup), Qice, & the mass of the ice. Qcup = Qwater Specific heat Solids (J/kg.K) Aluminum 900 Liquids Specific heat (J/kg.K) Brass 402 Bromine 473 Copper 377 Ethyl 2400 Alcohol Glass 840 Gasoline 2220 Gold 126 Glycerin 2430 Ice 2095 Mercury 140 Iron 461 Water 4186 Qice mice = Lead 130 Nickel 502 Latent Heat Substance (J/kg) Silver 239 Steam water 2,260,000 Styrofoam 1131 Ice water 333,000 Zinc 390
A 0.1375-g sample of magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 1769 J °C1. The calorimeter contains exactly 300 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning magnesium, in kJ g-l and in kJ mol-!. The specific heat of water is 4.184 J g1 °C -1.
A coffee-cup calorimeter contains 55.0 g of water at 25.90° C. If 4.21 g gold metal at 89.20° C is placed in the calorimeter, what is the final temperature of the water in the calorimeter? The specific heat of water is 4.184 J/g° C; the specific heat capacity of gold is 0.129 J/g° C.