A 0.55 kg aluminum pan, c a l = 900 , on a stove is used...
A 0.55 kg aluminum pan, c a l = 900 , on a stove is used to heat 0.4 liters of water from 21 ºC to 92 ºC.
(a) How much heat is required? Q total = unit
What percentage of the heat is used to raise the temperature of (b) the pan %
and (c) the water? %
Homework Answers
(9%) Problem 11: Suppose you place 0.285 kg of 21.5°C water in a 0.55 kg aluminum...
(9%) Problem 11: Suppose you place 0.285 kg of 21.5°C water in a 0.55 kg aluminum pan with a temperature of 155°C, and 0.0075 kg of the water evaporates immediately, leaving the remainder to come to a common temperature with the pan. 0.20 Date: 131/2020 11:39:00 PM Substances Specific heat (c) Solids J/kg C kcal/kg. Aluminum 900 0.215 Concrete 840 Copper 387 0.0924 Granite 840 0.20 Ice (average) 2090 0.50 Liquids Water 4186 1.000 Gases Steam (100°C) 1520 (2020) 0.363(0.482)...
Problem 13: Suppose you place 0.255 kg of 20.5°C water in a 0.45 kg aluminum pan...
Problem 13: Suppose you place 0.255 kg of 20.5°C water in a 0.45 kg aluminum pan with a temperature of 144.5°C, and 0.012 kg of the water evaporates immediately, leaving the remainder to come to a common temperature with the pan. What would be the final temperature, in degrees Celsius, of the pan and water? The heat of vaporization of water is Lv = 2256 kJ/kg. You may neglect the effects of the surroundings and the heat required to raise...
uppose you pour 0.350 kg of 20.0°C water into a 0.900 kg aluminum pan off the...
uppose you pour 0.350 kg of 20.0°C water into a 0.900 kg aluminum pan off the stove with a temperature of 165°C. Assume that the pan is placed on an insulated pad. What would be the final temperature (in °C) of the pan and water if 0.0300 kg of the water evaporated immediately, leaving the remainder to come to a common temperature with the pan?
A 0.4 kg aluminum bowl contains 1 kg of H2O at 20°C. The latent heat of...
A 0.4 kg aluminum bowl contains 1 kg of H2O at 20°C. The latent heat of water is 334 x 103 J/kg. The specific heat of aluminum is 900 J/(kg°C). The specific heat for water is 4190 J/(kgK). The bowl and water are at thermal equilibrium. How many joules of heat is required to bring the water in the bowl to equilibrium at 10°C?
QUESTION 6 (100 marks) An aluminum pan whose thermal conductivity is 237 W/m. °C has a...
QUESTION 6 (100 marks) An aluminum pan whose thermal conductivity is 237 W/m. °C has a flat bottom with diameter 20 cm and thickness 0.4 cm. Heat is transferred steadily to boiling water in the pan through its bottom at a rate of 800 W. If the inner surface of the bottom of the pan is at 105°C, determine the temperature of the outer surface of the bottom of the pan, figure 4. STAR 0.4 cm 800 W Figure (4)
On a trip to Kruger, you heat 1.5 kg of water on a camping stove. The...
On a trip to Kruger, you heat 1.5 kg of water on a camping stove. The water is originally at 23 °C, and you heat it long enough to boil 0.65 kg of it away. A. How much heat went into increasing the temperature of the water? Units: J B. How much heat went into changing the phase of the water? Units: J C. In your camping stove, 50% of the energy released in burning the fuel goes into heating...
On a trip to Kruger, you heat 1.5 kg of water on a camping stove. The...
On a trip to Kruger, you heat 1.5 kg of water on a camping stove. The water is originally at 23 °C, and you heat it long enough to boil 0.65 kg of it away. A. How much heat went into increasing the temperature of the water? Units: J B. How much heat went into changing the phase of the water? Units: J C. In your camping stove, 50% of the energy released in burning the fuel goes into heating...
5. (15 pts) How much heat must be applied to a 1 kg pan to raise...
5. (15 pts) How much heat must be applied to a 1 kg pan to raise its temperature from 25°C to 185°C if: a. The pan is made of iron? b. The pan is made of copper? c. The pan is made of gold?
5. (15 pts) How much heat must be applied to a 1 kg pan to raise...
5. (15 pts) How much heat must be applied to a 1 kg pan to raise its temperature from 25°C to 185°C if: a The pan is made of iron? b. The pan is made of copper? c The pan is made of gold?
ue term -10° C to 25° C? 30.0 kg of water is contained in a 10.0...
ue term -10° C to 25° C? 30.0 kg of water is contained in a 10.0 kg aluminum pot. Both the water and the pot are initially at 20° C. How much heat (in Joules) is required to raise the temperatures of the water and pot to 105° C? 2. How much heat (in Joules) is required to raise the temperature of 20.0 kg of ice from-10° C to 0° C if half of the ice (10.0 kg) is converted...
(9%) Problem 11: Suppose you place 0.285 kg of 21.5°C water in a 0.55 kg aluminum pan with a temperature of 155°C, and 0.0075 kg of the water evaporates immediately, leaving the remainder to come to a common temperature with the pan. 0.20 Date: 131/2020 11:39:00 PM Substances Specific heat (c) Solids J/kg C kcal/kg. Aluminum 900 0.215 Concrete 840 Copper 387 0.0924 Granite 840 0.20 Ice (average) 2090 0.50 Liquids Water 4186 1.000 Gases Steam (100°C) 1520 (2020) 0.363(0.482)...
QUESTION 6 (100 marks) An aluminum pan whose thermal conductivity is 237 W/m. °C has a flat bottom with diameter 20 cm and thickness 0.4 cm. Heat is transferred steadily to boiling water in the pan through its bottom at a rate of 800 W. If the inner surface of the bottom of the pan is at 105°C, determine the temperature of the outer surface of the bottom of the pan, figure 4. STAR 0.4 cm 800 W Figure (4)
5. (15 pts) How much heat must be applied to a 1 kg pan to raise its temperature from 25°C to 185°C if: a. The pan is made of iron? b. The pan is made of copper? c. The pan is made of gold?
5. (15 pts) How much heat must be applied to a 1 kg pan to raise its temperature from 25°C to 185°C if: a The pan is made of iron? b. The pan is made of copper? c The pan is made of gold?
ue term -10° C to 25° C? 30.0 kg of water is contained in a 10.0 kg aluminum pot. Both the water and the pot are initially at 20° C. How much heat (in Joules) is required to raise the temperatures of the water and pot to 105° C? 2. How much heat (in Joules) is required to raise the temperature of 20.0 kg of ice from-10° C to 0° C if half of the ice (10.0 kg) is converted...
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