What BTU Of Heat Is Required To Raise 1 Pound Of Ice 1 When The Temperature Is Below 32 Degrees F?

To change one pound of ice at 32° to one pound of water at 32°, requires that

144 Btu

must be added. If that pound of 32° water is refrozen back to ice, 144° Btu are given up by the water. When we added the 144 Btu per pound to change the ice to water, we called it the Latent Heat of Melting or Fusion.

How many BTU's must be absorbed to raise the temperature of 1 pound of water by 1 degree Fahrenheit?

That one pound of water must absorb

970 Btu's

before it all turns to steam, and will stay at 212°F during the process. That's one match required to raise the temperature by one degree, and then almost 1,000 matches to boil off the water while not raising the temperature.

How many BTUs must be added to one pound of water at 32 F to raise the temperature to 212 F?

You have all heard of the BTU of heat energy (British Thermal Unit), it takes one BTU to raise one pound of water one degree Fahrenheit. So if the water in the pan on the stove is put in at 32°F, it will then require

180 BTU's

to bring the water to boiling temperature, or 212°F.

What amount of heat energy is needed to raise the temperature of 1 pound of water by 1 F?

The quantity of heat equal

to

¹


₁₈₀

of

the heat required to raise the temperature of one pound of water from 32° to 212°F at a constant pressure of one atmosphere.

What is defined as the heat required to raise one pound of any substance 1 degree Fahrenheit?

BTU

. “British Thermal Unit” Specific heat of a substance. The number of BTUs required to raise the temperature of one pound of a substance by 1 degree F.

How many BTU does it take to raise 1 gallon of water 1 degree?

Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires

8.33 BTU

to raise the temperature 1oF.

How much heat is required to increase the temperature of 20 lbs of water from 32f to 212 F?

Question: How much heat is required to increase the temperature of 20 lb of water from 32°F to 212°F? 20 lb x 0.5 x 180°F = 1,800 BTU 212 F – 32°F = 180 BTU O (20 x 144) + (20 x 180) + (20 x 970) =

25,880 BTU 20 lb x 180°F = 3,600 BTU

Question 33 (1 point) The state of matter with the highest energy level is: Liquid.

How many BTUs does it take to raise 1 degree?

It takes

0.24 BTU

of heat to change the temperature of one pound of air by one degree F.

What must exist in order to cause heat transfer?

Both substances must be the same temperature. At

least one substance must be a liquid

. Most of the molecules must be slow moving.

How BTUs must be removed from one pound of 32 degree water to change it to a pound of 32 degree ice?

So to cool one pound of water one degree, we must remove one Btu. The same applies in changing from a solid to a liquid, or from a liquid to a gas; or the reverse from a gas to a liquid, or a liquid to a solid. To change one pound of ice at 32° to one pound of water at 32°, requires that

144 Btu

must be added.

How many watts does it take to heat 1 gallon of water 1?

A typical 50-gallon electric tank runs at

4500 watts

.

Heating from 68 F to 104 F would by a 36 F rise, or 36 x 8.33 = 300 BTU to heat 1 gallon of water.

What determines how much something will change temperature?

The heat Q transferred to cause a temperature change depends on the

magnitude of the temperature change, the mass of the system, and the substance and phase involved

. (a) The amount of heat transferred is directly proportional to the temperature change.

What is the amount of heat required to raise the temperature of water referred to as?

A calorie

is defined as the amount of heat required to change the temperature of one gram of liquid water by one degree Celsius (or one degree Kelvin).

What must be added to increase the temperature of steam?

Just what is steam? Steam is water in its gaseous state. Enough heat has to be added to the water to raise the temperature of

liquid water

to its boiling point, and then more heat is added to cause a change of state to steam without an increase in temperature.

Which of these represents the amount of heat needed to raise the temperature of 1 liter of water 1 c?

The modern (small) calorie

is defined as the amount of energy needed to increase the temperature of 1 gram of water by 1 °C (or 1 K, which is the same increment).

How many Btus does it take to raise one pound of water from freezing to boiling?

For water, this is

144 Btu per pound

. When ice changes back into liquid water, an equivalent amount of heat is absorbed …