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A 1500 W electric kettle is used to heat 2.0 kg of water that is initially...
An aluminum kettle weighs 1.05 kg. (a) What is the heat capacity of the kettle? (b) How much heat is required to increase the temperature of this kettle from 23.0 °C to 99.0 °C? (c) How much heat is required to heat this kettle from 23.0 °C to 99.0 °C if it contains 1.25 L of water (density of 0.997 g/mL and a specific heat of 4.184 J/g °C)?
If, for example, your electric water kettle provided 75J of thermal energy to heat the water for every 100J of electrical energy consumed from the outlet, calculate the efficiency of your electric water kettle in heating the water (as a decimal).
An electric heater is used to heat up 3.00× 102 kg of water from 10.0°C to 80.0°C in twenty minutes. Assuming that the heater is connected to a 120-V (rms) source and all electric power is used to heat the water, what is the resistance of the coil in the heater? The specific heat of water is 4186 J/(kg K).
An iron kettle contains 3.1 kg of ice at -4 deg C. The pot is 2.2 kg and initially has a temperature of 18 deg C. The pot stands on a hot plate, delivering 2.3 kW, and the voltage is 220 V. a) What is the current in the hot plate? b) How long does it take until the ice is melted (0 deg C)? c) You now want to boil the water in the kettle in exactly 15 minutes....
10. A kettle with a power rating of 2.00 x 10 W heats 1.95 kg of water from 22.1 °C to 42.8°C in a time of 124 s. a) What is the amount of input energy? 2 marks b) What is the amount of output energy? 2 marks c) What is the % efficiency of the electric kettle? 2 marks
What is the heat capacity of a 20.2-kg block of ice? The specific heat capacity of ice is 2.10 kJ/kg K. kJ/K It takes 880 J to raise the temperature of 350 g of lead from 0°C to 20.0°C. What is the specific heat of lead? kJ/(kg K) A heating coil inside an electric kettle delivers 3.20 kW of electric power to the water in the kettle. How long will it take to raise the temperature of 0.390 kg of...
An aluminum tea kettle of 0.45-kg containing 2.40-kg of water at 25°C is placed on a burner. Assuming that the burner is rated at 2000 Watt, how long will it take to bring the water to a boil? (b) Once boiling begins, how much time is required to boil all the water out of the tea kettle? Assume that no energy is lost in this process. Latent Heat of Fusion Latent Heat of Vaporization Specific Heats SubstcJkg. C cal/g- CS...
Question: A kettle holding 1.18 L of water at T, 16.7 C is switched on. The kettle uses P 1286 W of electricity. The latent heat of vaporization is L 2.26 x 10Jkgwhile the latent heat of fusion is L3.33 x 10 Jkg Part 1) How much energy is required to increase the temperature of the water to 100 C? Q = Part 2) If the kettle is 100% efficient, with all the supplied power going into heating the water,...
A 50-gallon electric water heater is used to heat tap water with an initial temperature of 15oC. The heating level is set at a maximum while several people are taking their showers. If the maximum heating level of the heater is 7.5kW of electricity and the water use rate is 3 gal/min, what is the temperature of the water exiting the heater? Assume that the system is at steady state and the heater is 100% efficient; that is it is...
The burner on an electric stove has a power output of 2.0 kW. A 690 g stainless steel tea kettle is filled with 20∘C water and placed on the already hot burner. If it takes 3.6 min for the water to reach a boil, what volume of water, in cm3, was in the kettle? Stainless steel is mostly iron, so you can assume its specific heat is that of iron. Express your answer using two significant figures.