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How much heat energy is needed to change 10 kg of ice at 20 -20 C to water at 50 C?
Wiki User
∙ 12y ago
The energy required to heat an object is equal to mc(Tf - Ti).
Q = mcΔT
m is the mass (In kilograms)
c is the specific heat (The specific heat of water is 4,186 J/(kg°C))
ΔT is the change in temperature
In this case, the energy required is (10)(4,186)(144--17), which is 6,739,460 Joules, or about 6.7 x 106 Joules (If significant figures are considered).
Wiki User
∙ 13y ago
Wiki User
∙ 11y agoq = m x C x ΔT
q = amount of heat energy gained or lost by substance
m = mass of sample in grams = 10000g
C = heat capacity of water = 4.186 J/g•oC
ΔT = change in temperature (Tf - Ti) = (115 oC - 25 oC) = 90 oC
q = 10000g x 4.186 J/g•oC x 90 oC = 3767400 Joules
Wiki User
∙ 12y agoUsing Q=mcΔt
10*4.18*70= 2.926MJ
Don't sue me if it's wrong though.
Wiki User
∙ 12y agoSpecific heat capacity of water = 4186 joules - kg - celcius.
So: 4186 * 10 * 30 = 1,255,800 joules
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Energy needed to change material from solid to liquid?
heat is a mesure of energy the more energy the hotter it is so depending on its melting point is how much energy/heat is needed
What is needed for matter to change phase?
Heat is needed for matter to change form eg: Melting, condensation, etc.
What is the heat energy needed to change a liquid to gas while the temperature stays the same?
(latent) heat of vaporization
What energy is needed to change a material from solid to liquid?
Heat energy, usually. However, some substances will change states under the influence of UV or other radiation.AnswerThe energy needed to change a material from a solid to a liquid is called the 'latent heat of fusion', or just the 'heat of fusion'. It is equal to the amount of energy or heat given off by the same material to change it from a liquid back into a solid.Each material has its own heat of fusion. Take solid water (ice) at 0o Celsius, the freezing point. Water's heat of fusion is 79.71 calories per gram. That means that you will need to add 79.71 calories of heat to each gram of ice (solid water) to turn it into liquid water. Interestingly, once that's done, the water will still be at 0o Celsius! The heat was used just to change the water's state from solid to liquid. Once the ice is liquid, then any more heat added will increase the temperature of the liquid, and each calorie of heat will increase the water's temperature about 1o Celsius.This is a similar concept to a material's 'heat of vaporization', which is the amount of energy required to change a liquid to a gas.The amount of heat necessary to change a substance from a solid to a liquid or vice versa is commonly called the heat of fusion. It is more properly known as the standard enthalpy of fusion, or also the latent heat of fusion, or the enthalpy change of fusion. The specific temperature at which the change occurs is defined as the melting point of that substance. A link can be found below.The amount of energy a substance must absorb in order to change from a solid to a liquid is the heat of fusion. A change in which a system absorbs energy from its surroundings is endothermic change.
What is the difference between heat of fusion and heat of vaporization?
Latent heat is the amount of thermal energy required to change the phase of a substance. Latent heat of fusion is the amount of energy needed to change it from a solid to liquid or a liquid to solid, and the latent heat of vaporization is the thermal energy needed to change from a liquid to gas or a gas to liquid. For example, in the equation Q = mL, Lfusion (latent heat of fusion) for water is 75.5 cal/gram. Lvaporization (latent heat of vaporization) for water is 539 cal/gram. Substances have different latent heats.
What is the name of heat energy that changes ice into water and water into steam?
Latent heat is the measurement of energy needed to change the state of a substance at its melting point or boiling point. The latent heat of fusion of water is the amount of energy needed to change a fixed amount of water from a solid to liquid at 0 degrees C. this works out to be more than 800KJ of heat energy. The latent heat of vaporization of water is the amount of energy needed to change a fixed amount of water from a liquid to a gas at 100 degrees C. this is more than 1200KJ of heat needed to be absorbed.
Why considerable heat energy is needed to convert 1g of water into 1g of steam at 100c without any change in temperature taking place?
There is heat needed to transform the configuration of liquid water to gaseous state. This is change of state energy changes the configuration without changing the temperature.
Which form of energy is needed to change water from a liquid to gas?
Heat is applied to water to raise the Kinetic energy of the individual molecules so that they eventually break away from the surface of the liquid state in ever increasing numbers.
What is needed for matter to change states?
heat energy
What factor affects the the change in temperature when a salt is dissolved in water?
The binding energy of the molecule compared to the binding energy of the ions it splits into when it is dissolved determines the change in heat of the water. The stronger a molecule is bound, the higher its binding energy and the more heat is needed to break it apart, which cools the water.
Energy needed to change material from solid to liquid?
heat is a mesure of energy the more energy the hotter it is so depending on its melting point is how much energy/heat is needed
What is needed for matter to change phase?
Heat is needed for matter to change form eg: Melting, condensation, etc.
What is the name of the energy needed to change a substance from a liquid to a gas?
The energy needed to change a substance from a liquid to a gas is called the enthalpy (or heat) of vaporization.
What do you call the amount of energy needed to change a material from a solid to a liquid. propane or water?
Heat of fusion. (I have no idea what the "propane or water" part is supposed to mean.)
Energy that is absorbed by land and water is changed into?
some of the energy,however, is absorbed by the land and water and change into heat
A materials heat of funsion gives the ammount of energy needed to?
The heat of fusion, also known as the enthalpy of fusion is how much energy is required to melt a solid to a liquid. This is the energy required to change the phase of the material - not the temperature. In fact at the melting point the heat capacity becomes infinite because all the energy is being used to change state and not temperature.As energy cannot be created or destroyed it is reasonable to assume it is the same amount of energy for a liquid to turn into a solid, which it is.So if energy is needed to change the phase of ice into water, the same amount of energy is released when water changes back into ice.
Why does water take so long to warm up?
The specific heat of water determines how much energy is needed to heat water.
