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- 1. Multiple Choice
There are four main processes in changing of phase, and they are
Melting
Boiling
Condensation
All the above
- 2. Multiple Choice
Latent heat is
the heat absorbed or released at a boiling process during a change of phase
the heat absorbed or released at a constant temperature during a change of phase
the heat absorbed or released at a constant temperature during a change of phase of 1 kg object
the heat absorbed or released by an object to increase or decrease its temperature by 1 degree Celcius
- 3. Multiple Choice
the symbol for specific latent heat is
c
L
Q
m
- 4. Multiple Choice
Water molecules have the greatest kinetic energy in
Ice at 0 ⁰C
Water at 90 ⁰C
Water at 373 K
Steam at 150 ⁰C
- 5. Multiple ChoiceThe amount of energy required to raise the temperature 1ºC for every kilogram is called____?Thermal EnergySpecific HeatTemperatureKinetic Energy
- 6. Multiple ChoiceWhat is the equation to measure change in Thermal Energy?Q=mc∆tQ=mcQ= ∆mctm=QC
- 7. Multiple ChoiceWater has a specific heat of 4184 J/KgºC. Wood has a specific heat of 1760 J/KgºC. What material needs more energy to raise the temperature 1ºCWoodWaterBoth are the same
- 8. Multiple ChoiceA material was cooled from 100ºC to 40ºC. What is the temperature change?60ºC40ºC-60ºC-40ºC
- 9. Multiple ChoiceHow does heat flow?Always from cold to warmAlways from warm to coldBoth warm to cold & cold to warmIt depends on the temperature
- 10. Multiple ChoiceIf I heat up 2 pans of water one has 100 mL in it and one has 1000mL. Which one heats up the fastest?100 mL1000 mLThey both heat up at the same speedThey cool down.
- 11. Multiple Choice
How much energy is needed to raise the temperature of 5.0 grams of lead from 25°C to 35°C? [specific heat (c) = 0.129 J/(g•°C)]
6.45 J/(g•°C)
6.45 J
16.1 J/(g•°C)
d.16.1 J
- 12. Multiple Choice
Which of the following best explains why the sand at the beach is hotter than the water?
Sand has a higher specific heat than water.
Sand has a lower specific heat than water.
There is more water than sand at the beach.
There is more sand than water at the beach.
- 13. Multiple Choice
What would be the effect on the particles if more heat is supplied to the system?They would slow downThey would stop movingThey would speed upThere would be no effect - 14. Multiple ChoiceThere are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?Large cup (Trenta)Small cup (Tall)VentiAll three are the same temperature so they have same thermal energy
- 15. Multiple ChoiceThe specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?12.82 °C24.12°C351 °C
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