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Chem unit1 test
Chem test
| Question | Answer |
|---|---|
| Endothermic= | A chemical reaction that absorbs heat from the sourroundings. |
| Exothermic= | A chemical reaction that releases the energy in the form of heat. |
| Heat= | A form of energy that is transferred by a difference in temp. |
| Specific Heat Capacity= | The measure of the heat energy required to increase the temp. of a substance by a certain temp. |
| Sulfate= | SO4 |
| Nitrate= | NO3 |
| Thermal Equillibrium= | A state in which all the different parts of a system are the same temp. |
| Cu= | copper |
| Zn= | Zinc |
| Na= | sodium |
| In what direction does heat flow?= | From hot to cold |
| A piece of Zinc is added to an acid solution. the contents of the beaker fizzes and feels hot. In what direction is the heat flowing?= | From the solution to the air. |
| Is this reaction endothermic or exothermic?= | Exothermic |
| If a person were at thermal equillibrium with their souroundings. would they be dead or alive?= | It depends on the temp. of their souroundings. If the temp. was between 78-108 then they would be alive. but if it was lower or higher they would be dead. |
| Explain your thinking= | If your body was lower than 78 degrees then you would get hypothermia and if it was above 108 degrees then you would have a heat stroke. |
| rearrange the formula q=m*C*DeltaT to solve for C= | q/m*DeltaT |
| Rearrange the formula q=m*c*DeltaT to slove for m= | q/C*DeltaT |
| If q stays the same, how does DeltaT change when you double the mass of the sample?= | It stays the same |
| When something has a high specific heat,does it heat up fast or slow?= | Slow |
| Explain you thinking= | The higher the specific heat the more energy it will take to heat up. |
| Equal masses of Aluminum and iron are given the same amount of heat. Aluminium has a specific heat of 0.9J/gDegreesC and iron has a specific heat of 0.45J/gC. If the iron mass warmed up by 20C, how much will the aluminum warm up?= | 40C because its twice as big. |
Created by:
WillLyons
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