| Elements | ||
| #1 | Give the chemical symbol for rubidium. | Rb |
| #2 | Give the chemical symbol for gold. | Au |
| #3 | Pb is the chemical symbol for what element? | Lead |
| #4 | Sr is the chemical symbol for what element? | Strontium |
| #5 | What is the chemical symbol for tungsten? | W |
| Mixtures and Such | ||
| #1 | Chicken noodle soup is an example of what type of mixture? | heterogeneous |
| #2 | Another name for a homogeneous mixture. | solution |
| #3 | A pure substance made of only one type of atom. | element |
| #4 | In the scientific method, an educated guess is a ____________. | hypothesis |
| #5 | The separation technique that is based on the principle that substances migrate along a gradient with a solvent at a rate unique to each substance. | chromatography |
| Phases | ||
| #1 | The process of changing from a solid to a gas with no liquid phase. | Sublimation |
| #2 | Had definite volume but no definite shape | liquid |
| #3 | The temperature at which something changes from a liquid to a gas. | boiling point |
| #4 | Molecules in this phase of matter are attracted to each other so strongly that the molecules cannot move past each other. | Solid |
| #5 | What occurs when energy is removed from a liquid-vapor system at equilibrium? | the amount of liquid increases. |
| Hodge Podge | ||
| #1 | The branch of chemistry associated with the study of the composition of samples. | analytical chem. |
| #2 | Changing the energy of a substance can change its ______________. | phase |
| #3 | The heat required to raise the temperature of 1 gram of a substance 1 degree Celsius is known as _______________. | specific heat |
| #4 | The amount of energy absorbed or lost by a system as heat during a process at a constant pressure is known as _________________. | enthalpy |
| #5 | Type of chemical reaction that absorbs energy and requires energy for the reaction to occur | endothermic |
| Heat Calculations | ||
| #1 | How much energy is required to increases the temperature of 100 g of water from -50 to -10 degrees celsius? | 8200 J |
| #2 | The amount of heat energy released when 50 g of water is cooled form 20 to 10 degrees celsius | 2090 J |
| #3 | What is the enthalpy change when 10 g of water are heated from 285 to 300 K? | 303 J |
| #4 | How much energy is required to melt 10 g of water at 0 degrees celsius? | 3340 J |
| #5 | How much energy is required to convert 152 g of liquid water to steam at 100 degrees celsius? | 343520 J |
| Final Question | |