(a) A piece of unknown metal weighs 184 g. When the metal piece absorbs 482.8 J of heat, its temperature increases from 24.5 °C to 40.9 °C. Determine the specific heat of this metal.
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Q: (a) The number of kilocalories in food is determined by calorimetry techniques in which the food is…
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- 1. (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 are there in a 6-g peanut if the energy from burning it is transferred to 0.5 kg of water held in a 0.1 -kg aluminum cup, causing a 55.9 °C temperature increase? The specific heat of water is 1.00 kcal/kg °C, and the specific heat of aluminum cup is 0.215 kcal/kg °C. Q kcal/g mp (b) Compare your answer to labeling information found on a package of peanuts and comment on whether the values are consistent. A label for unsalted dry roasted peanuts says that 30 g contains 185 calories (kcal). Find the (Q/m) from calorimetry techniques of the label on a box of roasted peanuts. Q EGE 4.86 m cal m label3. (a) The rate of heat transfer through a wood shingles roof of 4.50 m length, 3.90 m width and in 8.50 cm thickness is 126.65 W. The temperature of outside and inside-surface is 33.5 °C and 26.5 °C, respectively. (i) Determine thermal resistance, R of the wood shingles roof. (ii) Calculate the thermal conductivity. Give your answer in 3 decimal places. (iii) If a glass wool with higher thermal resistance is used to replace the wood shingles roof, determine which material tend to have lesser rate of heat transfer.An automobile cooling system holds 3.00 kg of water. If the engine is run until 6.73 x 103 J of heat is added, determine the change in temperature for the water coolant?
- An aluminum pizza pan of mass 1.67 kg is initially at a room temperature of 18.5 degrees Celsius. The pan is then placed in the oven to be used for cooking a pizza. Once inside the oven, the pan reaches a temperature of 275 degrees Celsius. If the heat trasferred from the over to the aluminum pan is 387000 J, find the value of the specific heat capacity of aluminum.In an insulated vessel, 239 g of ice at 0°C is added to 635 g of water at 15.0°C. (Assume the latent heat of fusion of the water is 3.33 x 10° J/kg and the specific heat is 4,186 J/kg · °C.) (a) What is the final temperature of the system? °C (b) How much ice remains when the system reaches equilibrium?