chem unit 2
| What is matter? | Matter is anything with mass and volume |
|---|---|
| Define volume. | Volume is how much space something takes up |
| Define mass. | Mass is how much of something there is |
| What is the difference between mass and weight? | mass is how much matter there is, wight is the amount of gravitational force exerted on an object |
| What is energy, and what is its unit of measure? | Energy is the ability to cause matter to move or do work. It is measured in the SI unit joules |
|---|---|
| What is work? | Work is the ability cause matter to move against an opposing force |
| Define potential energy. | Potential energy is stored energy that is about to be in motion |
| List examples of potential energy with their descriptions. | gravitational energy, electric potential energy, stored mechanical energy |
| Define kinetic energy. | The energy that an object has due to being in motion |
| List examples of kinetic energy with their descriptions. | thermal energy, electric energy, sound |
| What is the law of conservation of energy? | The law of conversion of energy states that energy can be converted from one form to another, but it is not created or destroyed in ordinary physical and chemical processes |
|---|---|
| Give two examples of energy conversion. | In a dam, there is potential energy that is stored because the water is being held back. As water moves through the dams systems, however, it is converted into kinetic energy. As in goes through the machinery of the dam, it is also converted into mechanical and electrical energy |
| What is the difference between trying to conserve energy and the conservation of energy? | Conserving energy means to inhibit an object from expending a certain form of energy; however, in doing this energy is still used in but in some other form. The conservation of energy means that although energy forms change, the total amount of energy doesn’t. |
| What does temperature measure? | the kinetic energy of the vibrations caused my molecules |
|---|---|
| What are the freezing and boiling points of water in the three different temperature scales? | In F, the freezing point is 32° and the melting point is 212°. In C, the freezing point is 0°, and the melting point is 100°. In K, the freezing point is 273.15° and the melting point is 373.15°. |
| How do you convert between Celsius and Kelvin? Record some practice conversions. | You use that 0°C=32°F=237.15°K as a conversion factor. |
| How does increased temperature affect the amount of salt, carbon, and other substances able to dissolve in the ocean? What are the resulting effects? | Salt, carbon and other substances can easily dissolve into the ocean. Unfortunately, pollutants can also dissolve into the ocean, inhibiting the oceans ability to dissolve and break down carbon dioxide, thus increasing the amount of CO2 in the air, in turn warming up oceans and repeating the vicious cycle again. |