a. The heat of an object is the total energy of all the molecular motion inside that object. Temperature is the measure of the thermal energy or average heat of the molecules in a substance.
b. Examples of phase changes are melting (changing from a solid to a liquid), freezing (changing from a liquid to a solid), evaporation (changing from a liquid to a gas), and condensation (changing from a gas to a liquid). Melting, freezing, vaporization, condensation, sublimation, and deposition are six common phase changes.
Melting: An example of melting is an ice cube turning into liquid water when you set it on a surface, or hold it in your hand.
Freezing: Freezing is when liquid water freezes into ice cubes.
Evaporation: An example of evaporation is a puddle of water drying out.
Condensation: An example of condensation is when a glass of ice water forms water droplets on the outside
c. Heat capacity, ratio of heat absorbed by a material to the temperature change. It is usually expressed as calories per degree in terms of the actual amount of material being considered, most commonly a mole (the molecular weight in grams).
d. Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. The behavior of gasoline on a hot day provides an example of liquid thermal expansion in response to an increase in temperature. Other examples of thermal expansion include: The air in a car tire gets warm after a long journey and this increases its pressure.
Answers & Comments
Answer:
1) heat is the quality of being hot while temperature is the intensity of heat present in a substance or object
2) liquid gas, gas solid, solid gas etc
3) the number of heat units needed to raise the temperature of a body by one degree.
4) ex: cracks in some roads are because of heat/heating,
3 thermal expansion: linear expansion, areal expansion and volumetric volume.
Answer:
a. The heat of an object is the total energy of all the molecular motion inside that object. Temperature is the measure of the thermal energy or average heat of the molecules in a substance.
b. Examples of phase changes are melting (changing from a solid to a liquid), freezing (changing from a liquid to a solid), evaporation (changing from a liquid to a gas), and condensation (changing from a gas to a liquid). Melting, freezing, vaporization, condensation, sublimation, and deposition are six common phase changes.
Melting: An example of melting is an ice cube turning into liquid water when you set it on a surface, or hold it in your hand.
Freezing: Freezing is when liquid water freezes into ice cubes.
Evaporation: An example of evaporation is a puddle of water drying out.
Condensation: An example of condensation is when a glass of ice water forms water droplets on the outside
c. Heat capacity, ratio of heat absorbed by a material to the temperature change. It is usually expressed as calories per degree in terms of the actual amount of material being considered, most commonly a mole (the molecular weight in grams).
d. Thermal expansion is the tendency of matter to change in shape, volume, and area in response to a change in temperature. The behavior of gasoline on a hot day provides an example of liquid thermal expansion in response to an increase in temperature. Other examples of thermal expansion include: The air in a car tire gets warm after a long journey and this increases its pressure.