A 295-g aluminum engine part at an initial temperature of3.00°C absorbs 85.0 kJ of heat. What is the final temperature ofthe part (specific heat of Al = 0.900 J/g·°C)?
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A 295-g aluminum engine part at an initial temperature of3.00°C absorbs 85.0 kJ of heat.
What is the final temperature ofthe part (specific heat of Al = 0.900 J/g·°C)?
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- 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. NoneA heavy pot made of copper has a mass of 2.24 kg (including the lid) and is heated in an oven to a temperature of 154 °C. You pour 0.12 kg of water at 26.0 °C into the pot and quickly close the lid so that no steam can escape. We assume that no heat is lost to the surrounding. For copper, Ccopper 390 J/(kg.K) For water, Cwater 4190 J/(kg.K), L, = 2256 kJ/kg, L; = 333 kJ/kg. %3D What is the final mass of steam in the pot? onA 195 g aluminum engine part at an initial temperature of 3.0˚C absorbs 40.0 kJ of heat (q). What is the final temperature of the part after absorbing this heat? (sAl = 0.9 J/g˚C)
- 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?Exactly 46.33 kJ of heat is transferred to a 1.389 kg slab of nickel at a temperature of 12.7°C. (a) If the specific heat of nickel is 0.445 J/g:K, what will be its final temperature? (b)Specify the molar heat capacity of this metal.A 319−g aluminum engine part at an initial temperature of 11.47° C absorbs 61.0 kJ of heat. What is the final temperature of the part (c of Al = 0.900 J/·K)?
- A 0.310 kg aluminum bowl holding 0.805 kg of soup at 25.0\deg C is placed in a freezer. What is the final temperature (in \deg C) if 389 kJ of energy is transferred from the bowl and soup, assuming the soup's thermal properties are the same as that of water?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 20.0 g ice cube is dropped into 200 g of water in a thermally insulated container. If the water is initially at 20.0°C, and the ice comes directly from a freezer at -18.0°C, what is the final temperature in °C at thermal equilibrium? Heat of transformation for ice is L;=79.5 cal/g. Specific heat for water is 1.00 cal/gK, and for ice 0.530 cal/gK. 1.83 none of them 13.2 0.00 10.1
- A large power plant heats 1527 kg of water per second to high-temperature steam to run its electrical generators. (a) How much heat transfer is needed each second to raise the water temperature from 45.0°C to 100°C, boil it, and then raise the resulting steam from 100°C to 450°C? Specific heat of water is 4184 J/(kg · °C), the latent heat of vaporization of water is 2256 kJ/kg, and the specific heat of steam is 1520 J/(kg · °C). (b) How much power is needed in megawatts? (Note: In real power plants, this process occurs under high pressure, which alters the boiling point. The results of this problem are only approximate.)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 glass window is 3.7 mm thick, is 2.29 m tall by 1.04 m wide, and has a thermal conductivity of 1.0 W/m K. What is the rate of heat loss (in W) through the window if the inside temperature is 22.3° C and the outside temperature is -20.7 ° C ?