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How does the amount of heat required to change water from a solid to a liquid compare with the amount needed to change from a liquid to a gas?
Very simply, the amount of heat required to change state is exactly the same for solid to liquid (ice to water) and liquid to gas (water to steam) for a given substance, in this case water.
The basic measurement of heat is the BTU (British Thermal Unit). 1 BTU is the quantity of heat required to raise 1 pound of water 1 degree Fahrenheit at atmospheric pressure. Keep in mind that there are two 'types' of heat to consider when contemplating the change of state of a substance: Sensible heat and latent heat. Clearly, sensible heat we can measure directly with a thermometer. Latent heat is a calculated quantity. When water undergoes the change of state from water to steam (liquid to gas) it does so through the gain of heat quantity. That heat gain that causes the change of state is latent heat, i.e; the actual heat gain is unmeasurable by thermometer since the temperature of that water is 212 deg f as it undergoes the change of state to steam, and that steam is also 212 deg f. Any increase in the temperature of the steam is said to 'superheat' the steam. As an example, steam fed boilers are nearly always supplied with 'superheated' steam at temperatures near 600 deg f.
We see the addition of heat quantity as sensible heat during the rise of the waters temperature to 212 deg f (we are able to measure the rise in temperature), then we see the addition of heat quantity as latent heat during the change of state to gas from liquid (no change in the measurable temperature during the change of state), and again the addition of heat quantity as sensible heat in the process of 'superheating' the steam to any temperature above 212 deg f.
If you can quantify the amount of water in pounds, you can quantify the amount of heat in BTU's.
What else can I help you with?
What do we call the amount of energy required to change from a liquid to a solid?
The amount of energy required to change from a liquid to a solid is called the heat of fusion. This energy is needed to disrupt the intermolecular forces holding the particles in a liquid state and rearrange them into a solid structure. It is also known as the latent heat of fusion.
What does the latent heat of vaporization represent?
The amount of energy required to turn a mole of a liquid into a gas
What does the latent heat of fusion represent?
The energy required to melt a substance. (Apex)
What is the latent heat of fusion?
The amount of energy it takes to boil a substance
How much heat must be removed from steam to change it to a liquid?
The amount of heat that must be removed from steam to change it to a liquid is the latent heat of vaporization of water, which is approximately 2260 kJ/kg at atmospheric pressure. This is the amount of energy required for water to change from a gas to a liquid state at a constant temperature.
What is specific latent of fusion?
It is the amount of energy required to change 1kg of solid into a liquid with no temperature change.
What is specific latent heat of vaporisation?
Is the amount of energy required to change 1kg of liquid into gas with no temperature change.
What is the energy required to go from liquid to gas called?
The latent heat of vaporization
What do we call the amount of energy required to change from a liquid to a solid?
The amount of energy required to change from a liquid to a solid is called the heat of fusion. This energy is needed to disrupt the intermolecular forces holding the particles in a liquid state and rearrange them into a solid structure. It is also known as the latent heat of fusion.
What is heat fusion and heat of vaporization measures of?
The heat of fusion is the amount of heat (not temperature) required to change a solid to a liquid. It is also known as the melting point. The heat of vaporization is the amount of heat (not temperature) required to change a liquid to it's gaseous state. It is also know as it's boiling point.
The amount of heat necessary to change a liquid to a solid at constant temperature?
None - heat is evolved, not required.
What does the latent heat of vaporization represent?
The amount of energy required to turn a mole of a liquid into a gas
What does the latent heat of fusion represent?
The energy required to melt a substance. (Apex)
What is the latent heat of fusion?
The amount of energy it takes to boil a substance
How much heat must be removed from steam to change it to a liquid?
The amount of heat that must be removed from steam to change it to a liquid is the latent heat of vaporization of water, which is approximately 2260 kJ/kg at atmospheric pressure. This is the amount of energy required for water to change from a gas to a liquid state at a constant temperature.
What is the amount of liquid measured in L or ml?
Either. It depends on the amount of liquid to be measured and the precision required.
What is the heat of evaporation?
The heat of evaporation, also known as latent heat of vaporization, is the amount of energy required to change a substance from liquid to gas at its boiling point without changing its temperature. This energy is used to overcome the intermolecular forces holding the liquid together.
