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How do you calculate the heat rejected using only temperature and work?
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If you have the heat of formation of a substance at a given temperature how do you calculate its heat of formation at a different temperature?
Say u know heat of formation at temperature Ta and u want to calculate it at a temperature Tb Delta H(at Tb) = Delta H(at Ta) + integral of (Heat capacity) from Ta to Tb
How would you calculate how much heat energy is required to raise the temperature of coal?
The same as you would calculate for any other substance. You have to multiply all of the following: • The desired temperature difference. • The mass of the sample. • The specific heat, in this case, of coal.
How much heat is needed to heat gold?
That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.
Why is there heat rejection in a thermodynamic process?
In a practical heat engine, heat is generated by burning a fuel, work is extracted from this heat resulting in the working fluid cooling, and heat is then rejected at the lower temperature. As you must know, in an internal combustion engine heat is rejected both in the engine cooling system and the exhaust. In a power plant, using water/steam as the working fluid in a closed cycle, there are four phases in the cycle: 1. Water is pumped at high pressure into a steam raising unit (boiler) 2. Heat from the fuel, be it coal, oil, gas, or nuclear, is added to the water causing it to become steam 3. the steam is expanded through a turbine doing work, that is driving the generator 4. the steam is condensed back to water using external cooling water. This is called the Rankine cycle. At stage 4 heat is being rejected into the external cooling water, and this heat is lost. It is minimised by running the condenser under vacuum so that steam at less than 100 celsius can still do work, and the final turbine discharge temperature is as low as 30C. Theoretically the efficiency of such a cycle is maximised by making the steam to the turbine as hot as material constraints allows, and the condenser vacuum as low as the local cooling water temperature will allow. The maximum practical efficiency of such a plant is about 42 percent, meaning that 58 percent of the heat from the fuel is rejected. For a PWR nuclear plant the steam temperature is much lower and the cycle efficiency is less, more like 30 percent. I hope this enables you to see why in a practical heat engine there must be heat rejection. There are several entries in Wikipedia for further reading, see 'Heat Engines' first.
Can heat be an example of temperature?
Temperature is a measurement of heat. Heat is not an example of temperature.
What happens to the efficiency of a heat engine when the temperature of the reservoir into which heat energy is rejected is lower?
Efficiency would increase.
If you have the heat of formation of a substance at a given temperature how do you calculate its heat of formation at a different temperature?
Say u know heat of formation at temperature Ta and u want to calculate it at a temperature Tb Delta H(at Tb) = Delta H(at Ta) + integral of (Heat capacity) from Ta to Tb
If the heat capacity of an object is known what other information will need to be known to calculate its specific heat capacity?
By using the definition of "specific heat". You add a certain amount of heat, and see how much the temperature increases. You also need to measure the sample's mass. Then divide the amount of heat by (mass x temperature increase).
Short answer.how would find the specfic heat of a solid?
By using the definition of specific heat. 1) Calculate the change in heat energy2) Measure the mass of the object 3) Measure the change in temperature Divide (1) by (2) and by (3).
Short answer.How would you find the specfic heat of a solid?
By using the definition of specific heat. 1) Calculate the change in heat energy2) Measure the mass of the object 3) Measure the change in temperature Divide (1) by (2) and by (3).
How would you calculate how much heat energy is required to raise the temperature of coal?
The same as you would calculate for any other substance. You have to multiply all of the following: • The desired temperature difference. • The mass of the sample. • The specific heat, in this case, of coal.
What is an example of a sentence using the word temperature?
The temperature of the substance is equal to the amount of heat applied
How much heat is needed to heat gold?
That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.That depends on the amount of gold, and on how much you want to heat it. You have to multiply the amount, the temperature difference, and the specific heat of gold - of course, using compatible units.
What information is needed to calculate the amount of energy needed to heat of volume of water to some temperature?
You need the amount of water, the temperature of the water, and the desired temperature.
How many BTUs in 650 degrees F?
there is no conversion from temperature to BTU unless you know the mass and specific heat of a substance at a certain temperature. Then you could calculate the BTU required to heat the substance from a known starting temperature up to an ending temperature.
What are the factors considered for heat load calculation?
Which of the following variables are used to calculate the sensible heat load of a product? Group of answer choices Respiration heat, specific heat, and temperature change. Latent heat, product weight, and temperature change. Latent heat, product weight, and respiration heat. Product weight, specific heat, and temperature change.
How To calculate Specific Heat of A compound Such as NaOH?
Specific heat is the measure of energy it takes to raise a unit mass in temperature by one degree Celsius. When measuring a compound that is water soluble, heat it separately to a specific range, then use the liquid to calculate the amount of heat that was used.
