Heat

• Water is very useful in cooling agent because its high specific heat capacity.
• the process of changing liquid to solid at its freezing point when heat is removed from it is called solidification or freezing
• The process of changing the state of matter from gas to liquid by removing heat energy is condensation
• The process of changing the state of matter from solid to liquid by adding heat energy is melting
• The process of changing the state of matter from liquid to gas by adding heat energy is evaporization
• Sublimation is the change of state directly from solid to gas without passing through the liquid phase
• Latent heat is the amount of energy required to change the physical state of a substance without any change in temperature
• Specific latent heat is the amount of energy needed to change one gram of a substance's state without causing a change in temperature
• kelvin is not a unit of heat
• if heat is added to material, its temperature increases
• if heat if removed to material. its temperature decreases
• another effect of heat on a material aside from temperature change is phase change
• 4th matter, plasma
• final length formula - L= Li + Li a (Tf - Ti)
• How much heat needed = Q= Mcat
• how much calories - Q=mL
• heat = transfer of energy
• temperature - quantity that indicates the hotness or coldness of a substance
• thermal expansion - increase in volume when heated
• specific latent heat - amount of energy required to change state without changing temperature
• gas -> solid = deposition