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What is the negative heat for water as a ice?
The heat of fusion refers to the energy required to change a substance from a solid to a liquid at its melting point. For water to change from ice to liquid water, heat needs to be added, making the heat of fusion a positive value.
Do you need to increase or decrease the amount of heat energy to change a solid to a liquid?
Thermal (heat) energy must be added or removed in order to cause a change of state.
What phase change from liquid to gas will take place if you add energy equal to the heat of vaporization?
The liquid will boil.
When fire burns logs what kind of change is taking place?
When fire burns logs, a chemical change is taking place. The heat from the fire causes the wood to undergo combustion, which is a chemical reaction that breaks down the wood's molecular structure and releases energy in the form of heat and light.
What are 3 ways you know a chemical change has taken place?
Three signs of a chemical reaction include the release or absorption of heat, a change in color, and the creation of a gas or a precipitate.
What kind of change requires energy to absorbed in order to take place?
Endothermic reactions require energy to be absorbed in order to take place. This means that the reactions absorb heat from their surroundings in order to proceed.
What chemical change needs heat?
burning of wood
How much more heat needs to be added to water at 100 degrees centigrade in order to change it to steam?
Heat required to have such a change of state is called latent heat. If L J/kg is the latent heat per kg of water then for M kg of water we need M* L joule of heat energy
What state will most likely result if heat is added to a liquid?
It will change into a gas.Adding heat to or removing heat from a system may result in a temperature change and possibly a change of state. A liquid substance needs heat added to it in order to enter a gaseous state. If enough heat is added to a liquid substance it will change into a gas.
Will car over heat if it needs an oil change?
Not unless it is low of oil.
In order to change the phase of milk what had to be removed?
The heat energy in the milk had to be removed in order to change the phase of milk.
Does heat need to be taken away or added in order for cendensation to take place?
It needs to be added, in order for condensation to take place you have to have both cold and warm temperatures. For example, if you have ice water you usually have condensation because the ice and the air outside the glass mix and make condensation.
What is the negative heat for water as a ice?
The heat of fusion refers to the energy required to change a substance from a solid to a liquid at its melting point. For water to change from ice to liquid water, heat needs to be added, making the heat of fusion a positive value.
Why disc in microwave oven rotates at slow speed?
BECAUSE IN ORDER TO HEAT UP THE FOOD IT NEEDS TO GO SLOWLY TO GET THE TRUE HEAT!
A change of phase takes place at a constant?
A change of phase takes place at a constant temperature and pressure. During a change of phase, the substance absorbs or releases latent heat without a change in temperature.
Do you need to increase or decrease the amount of heat energy to change a solid to a liquid?
Thermal (heat) energy must be added or removed in order to cause a change of state.
Why do materials with high heat capacities heat slowly?
because by definition heat capacity is how much heat the substance needs to change its temperature by 1 degree. It "stores" heat and delivers it back slowly. It has nothing to do with heat resistance which is how much heat it allows through it.
