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What is used in energy calculations involving a substance being melted or frozen?
Wiki User
∙ 11y ago
q=mHf and q=mHv
in both where q= heat( in joules)
m= mass
Hf = heat of fusion, which is 334J/g
Hv= 2260J/g
Wiki User
∙ 11y ago
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Is ice a mixture or a pure substance?
Ice is solid H2O so it is a pure substance, at least ideally.
What substance is frozen in the human body?
The human body is about 209.5 degress celsius so any substance that has a melting point above that. Iron does so it would be a frozen substance in the human body. There are small amounts of iron in the human body.
How is something being petrified different from being frozen in ice?
Frozen thaws to it's original substance, petrified becomes stone.
Is heat added or released during freezing?
This is latent heat. When a liquid freezes heat is released, and when it melts the same amount of energy must be supplied. Similarly when a liquid changes to a vapor, or when a vapor condenses, heat must be supplied or is released. Latent heat varies from one substance to another, and can be quantified as so many calories per gram or kilogram, you can find data in reference tables
Do liquid particles gain energy when they are frozen?
No, liquid particles lose energy when frozen, everything loses energy when frozen and their molecular movement slows down. Their is a state called 0 degrees Kelvin which is the lowest temperature possible. At 0 degrees Kelvin all molecular motion is stopped and all energy is lost. Liquids would gain energy when heated.
When did the first pregnancy involving a frozen embryo occur?
1954
What substance expands when frozen?
water
Is heat lost gained or absorbed during sublimation?
Sublimation of a substance, for example, of frozen carbon dioxide or dry ice, involves the substance's absorbing heat energy from its surroundings. Hence, the dry ice itself gains the energy needed to change from solid to gas, and the surroundings lose the energy, and indeed are perceived as colder. Sublimation of a substance, for example, of frozen carbon dioxide or dry ice, involves the substance's absorbing heat energy from its surroundings. Hence, the dry ice itself gains the energy needed to change from solid to gas, and the surroundings lose the energy, and indeed are perceived as colder.
Is dry ice a substance?
Yes, dry ice is a substance. It is frozen carbon dioxide.
What is the physical state of iodine at freezing point?
Frozen. Any frozen substance is, by definition, solid.
Why the temperature does not rise during the process of melting and boiling though the heat energy is constantly supplied?
The energy must be applied to the phase change before it can heat the substance
Can fire be flash freezed?
No, fire is not a substance that can be frozen. It is a process.
Is ice a mixture or a pure substance?
Ice is solid H2O so it is a pure substance, at least ideally.
What substance is frozen in the human body?
The human body is about 209.5 degress celsius so any substance that has a melting point above that. Iron does so it would be a frozen substance in the human body. There are small amounts of iron in the human body.
What happens When a substance goes through the process of freezing?
ok, when a substance begins to freeze, it is because the particles of the substance lose energy and begin to move more and more slowly. eventually, these particles move slow enough to create bonds and voila, you have a frozen substance.
Does liquid lose chemical energy when frozen?
No. It loses thermal energy.
How is something being petrified different from being frozen in ice?
Frozen thaws to it's original substance, petrified becomes stone.
