Thermochemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What is exothermic? | Releasing energy from the substance to the surroundings
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| What is endothermic? | Absorbing energy from the surroundings to the substance
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| What is the equation for thermal energy? | J = Mass * Specific Heat * Changes in Temperature
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| What is the SI Unit for thermal Energy? | Joules
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| If an object's specific heat is higher, does it heats up quickly or slowly? | It heats up slowly
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| If an object's specific heat is lower, does it heats up quickly or slowly? | It heats up quickly
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| What is specific heat? | The amount of heat an object takes to raise the teperature of 1 gram of the substance 1 Celcius
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| What is the sign for exothermic reaction? | Negative
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| What is the sign for endothermic reaction? | Positive
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| If an object absorbs energy, does it becomes hotter or colder? | Hotter
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| If an object releases energy, does it becomes hotter or cooler? | Colder
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| What is the phase change from Solid to Liquid? | Melting
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| What is the phase change from Liquid to Gas? | Boiling/ Evaporation
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| What is the phase change (from Gas to Liquid) that occur when the mirror fogs up? | Condensation
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| What is the phase change from Gas to Solid? | Deposition
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| What is the phase change (Solid to Gas) that occurs when ice "disappears" in the freezer? | Sublimation
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| What is the boiling point for water? | 100 Celsius
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| What is the freezing point for water? | 0 Celsius
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| What is thermochemistry? | The study of heat changes that occur during chemical reaction and physical changes of state.
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| How do we find the change in teperature? | Final temp. - Intial temp.
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| How do you find the specific heat? | C = q/ m * changes of temperature
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| What is the unit for "q" ? | Heat energy
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| What is the unit for "m"? | Mass
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| What is the unit for change in temperature? | delta T
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| Where does boiling happen, in the water or on the surface of the water? | In the water
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| Where does evaporation happen, in the water or the surface of the water? | On the surface of the water
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| How does perspiration help cool your body? | The sweat takes away heat energy from your body, and evaporates
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| Is perspiration a phase of change? | No
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| What is the phase change (Liquid to Solid) that occurs when heat is removed from a liquid | Freezing
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| What is the phase change that keeps your body cool ? | Evaporation
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| Does condensation absorb or release energy? | Release energy
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| Is freezing endothermic or exothermic process? | Exothermic
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| Does melting absorbs or release energy? | Absorbs energy
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| Is boiling/ evaporation exotthermic or endothermic process? | Endtohermic
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