Question

1) Describe the difference between heat and temperature

2) Define the physical change and chemical change and give three examples of each

3) What range in temperature in Degrees Celsius is practical for each of the following

A.) A hot summer day in Wisconsin
B.) A cold autumn day in Wisconsin where puddles of water have ice forming on them
C.)The body temperature of a person who has a low fever

4) Describe the difference in kinetic energy, potential energy, and intermolecular attractive forces in solid water (ice), cold & hot liquid water, and gas (water vapor).

5) Assume your left hand came into contact with 1.0 gram of liquid water at 100° C in your right hand came in contact with 1.0 gram of water vapor (steam) at 100° C. Why would a burn from steam at a 100° C be more severe than a burn from one liquid of water at 100° C

6) Raising the temperature of 10.0 grams of water from 10.0° C to 20.0° C requires 100.0 calories of energy. While raising the temperature of 10.0 grams of aluminum from 10.0° C to 20.0° C requires 22 calories of energy. Why are more calories of heat required to heat the water?

Answer 1

1)Heat is the total amount of energy transferred from one system to another due to a temperature difference, while temperature is a measure of the average kinetic energy of the particles in a system.

2)Physical changes involve changes in the physical properties of a substance such as its size, shape, or state, while chemical changes involve a change in the molecular structure of a substance which can create new substances. Examples of physical changes include melting ice, cutting paper, boiling water, etc. Examples of chemical changes include burning wood, digesting food, rusting iron, etc.

3)A.) A hot summer day in Wisconsin - 30-38°C

B.) A cold autumn day in Wisconsin where puddles of water have ice forming on them - 0-4°C

C.)The body temperature of a person who has a low fever - 37-38°C

4) Solid water (ice) has the highest potential energy, lowest kinetic energy, and strongest intermolecular attractive forces. Cold liquid water has more kinetic energy than solid water, but less potential energy and weaker intermolecular attractive forces than solid water. Hot liquid water has more kinetic energy and potential energy than cold liquid water, but weaker intermolecular attractive forces than cold liquid water. Gas (water vapor) has the lowest potential energy, highest kinetic energy, and weakest intermolecular attractive forces of all three states of water.

5) Steam is at a higher pressure than liquid water which can make it significantly more dangerous. The higher pressure of steam causes the heat to be released more quickly and penetrate tissue much deeper than the same temperature of liquid water.

6) Water requires more calories of heat to raise its temperature because it takes more energy to break the hydrogen bonds between the molecules in the liquid state than it does for aluminum atoms to move further apart in order to maintain their liquid state.

Answer 2

Answer: Your welcome!

Step-by-step explanation:

Heat is the total energy of a system while temperature is a measure of the average kinetic energy of the molecules in the system. Heat is the energy transferred between systems while temperature is the measure of the average kinetic energy of the system.

Physical Change: A physical change is a change in the form of matter but not its chemical composition. Examples of physical changes include boiling, melting, freezing, condensing, and evaporating.

Chemical Change: A chemical change involves a chemical reaction which changes the chemical composition of a substance. Examples of chemical changes include burning, rusting, fermentation, and decomposition.