A man consumes 3000 kcal of food in one day, converting most of it to maintain body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate?

Q: If 7.5 kg of ice at 0 degrees celcius is put into an icebox, how many joules of heat are absorbed…

A: The heat absorbed by the ice to melt into water is given by                          Q= m L…

Q: On a day when the temperature reaches 50°F, what is the temperature in degrees Celsius and in…

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Q: On a day when the temperature reaches 500 F, what is the temperature in degrees Celsius and in…

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Q: The heat of vaporization of water is 2257 Joules/gram or 540 calories/gram. What energy in Joules is…

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Q: How much heat is needed to heat 5 kg of water from 20 degrees Celsius to water vapor at 100 degrees…

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Q: How much heat is transferred in 9 minutes through a glass window of size 1.4 m by 1.3 m, if its…

A: Solution:

Q: How much heat transfer is required to raise the temperature of 75 g of water from 14ºC to 28ºC?…

A: Write the given values of this problem. m=75 g or 0.075 kgIntial temperature(Ti)=14°CFinal…

Q: After the 1kg block of ice melts, the amount of heat required to raise its temperature to 10 oC is

A: The heat required to raise temperature to 10 degree Celsius is the sum of heat gained for meting ice…

Q: A cube of length 24cm is heated through a change in temperature of 80oC. If the coefficient of…

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Q: Two railroad cars, each with a mass of 56,000 kg, are heading at 95 km / h towards each other. They…

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Q: What would be the rate of energy loss, in Watts, for a piece of asphalt that has an area of 2.80 m2…

A: Given data: The area is A=2.8 m2. Temperature is T=60°C.

Q: A gasoline tank in a car has a capacity of 60 L at 20ºC. If the tank is fully filled without a…

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Q: The equation for the power emitted by the human body is P=5.67 X 10^-8 AT^4 . If the area of the…

A: Area of human body , A = 3.5 m2  Temperature , T = 25 ° C = 298.15 K To find = power emitted

Q: If 29.0 g of milk at a temperature of 3.95°C is added to a 260-g cup of coffee at a temperature…

A: Given Mass of milk is mm=29.0 g=29.0×10-3 kg Mass of coffee is mc=260 g=260×10-3 kg Initial…

Q: The specific latent heat of fusion for gold is 1.10x10^6 J/kg: How much energy is required to melt…

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Q: How many kilocalories of heat would be needed to melt 20kg of ice at -30 degrees Celsius and…

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Q: a small metal bar, whose initial temperature was10 degrees celcius, is dropped into a large…

A: According to Newton's Law of Cooling, T = Tm + cekt, where T = the required temperature after time…

Q: 2kg of ice at -10°C is heated until has melted. how much heat energy has been used? Specific heat to…

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Q: how many caloriers are absorbed by a pot of water with a mass of 500g in order to raise the…

A: Given data:  Mass (m) = 500 g Initial temperature (Ti) = 20°C Final temperature (Tf) = 30°C…

Q: A bottle containing 6 kg of water at a temperature of 15°C is placed in a refrigerator where the…

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Q: A 4 g sample of aluminum and a 4 g sample of copper are both at a temperature of 25°C. Aluminum has…

A: This problem is based on the Joules's law.   Write the expression of heat. Q=mcTf-Ti

Q: The heat of vaporization of ethyl alcohol is 8.5 x 10^5 J/kg. If 2 kg of it were allowed to vaporize…

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Q: 4 kg of ice at 0◦C is converted to steam at 100◦C. How much heat is needed? The heat of fusion…

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Q: A quantity of steam (390 g) at 113 degrees Celsius is condensed, and the resulting water is frozen…

A: Heat removed = mLv

Q: How much heat energy is required to vaporize 1 gram of of ice at 1 Celsius?

A: In the given question, We have to determine the heat energy to vaporize 1 gram of of ice at 1…

Q: How many joules are needed to change the temperature of 1 gram of water by 1°C?

A: Mass of water is 1g Temperature change is 1oC Specific heat capacity of water (s) is 4.2 J/g

Q: In 15 minutes please!!!

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Q: If you have 500 g of water at 25 degrees celcius and wish to heat it to 74 degrees Celsius, how much…

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Q: How long would it take a person with an average body (surface area of 1.8 m^2 and normal body…

A: Given  The surface area of the body is A = 1.8 m2. The number of moles of air is m = 2700 mol. The…

Q: How much natural gas do you need to burn to heat twenty gallons of water?

A: The energy released by the burning of natural gas will be equal to the energy absorbed by the water.…

Q: What is the latent heat of fusion of a substance if it takes 4.5 x 10 4 J to melt 750 grams?

A: Given data: Energy energy (E) =4.5 × 104 J Mass (m) = 750 g = 0.750 kg Required: Latent heat of…

Q: A 5-kilogram concrete block falls to the ground from a height of 10 meters. If all of its original…

A: The given values are, m=5 kgh=10 mCp=Cp,concrete=880 J/kg·K

Q: The number of grams of ice that can be melted by 1.5 g of 100oC steam is ______.

A: Given data The mass of steam is given as ms = 1.5 g. The temperature of the steam is given as Ts =…

Q: If 3000 Joules was used to heat up 100 grams of water, how much would the temperature of the water…

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Q: If 7,446J of energy was added to 4g of water that starts at 9°C, what will the final temperature be?…

A: Write the expression for the energy added. Here, m represents the mass, c represents the specific…

Q: The equation for the power emitted by the human body is . If the area of the human body is 3.5 m2,…

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Q: The water equivalent of 5 kg of a substance is 1 kg. By how much will its temperature change if 7550…

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Q: What is the amount of heat it generates in a minute?

A: according to joules heat law. heat generated in conductor H = i2Rt where i = amount of current…

Q: of Solutions ► If 1.00 kJ of heat is absorbed by a 15.5 g ice cube at -5.00 °C, what will the final…

A: Given, heat absorbed, Q = 1 kJ = 1000 J mass of ice, m = 15.5 g initial temperature, Ti=-5 °C final…

Q: 50 g of ice at 10°C is mixed with 70 g of water at 90°C, what will be the final temperature of a…

A: Let Tf be the mixture’s final temperature.

Q: How much energy in Joules is required to melt 415g of ice? The latent heat of fusion of ice is: Lf =…

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Q: A man consumes 3000 kcal of food in one day, converting most of it to thermal energy to maintain…

A: Heat of evaporation can be expressed as

Q: How many joules are needed to change the temperature of 1 gram of water by 1 degree C?

A:

Q: If 25 kJ is necessary to raise the temperature of a block from 25ºC to 30ºC , how much heat is…

A: The expression for the required necessary heat,

Q: A bottle containing 6 kg of water at a temperature of 15°C is placed in a refrigerator where the…

A: