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Heating Curves and Specific HeatPowerPoint Presentation

Heating Curves and Specific Heat

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Presentation Transcript

The flat lines on a heating curve represent…

- A temperature change.
- A constant state of matter.
- A change in state.
- A change in kinetic energy

The sloped lines on a heating curve represent…

- A constant temperature.
- A change in state of matter.
- A constant state of matter.
- A constant speed of particles

When does kinetic energy increase on a heating curve?

- On the flat portions.
- On the sloped lines.
- Every point on the curve.

If the specific heat of ice is 0.5 cal/gC°, how much heat would have to be added to 200 g of ice, initially at a temperature of -10°C, to raise the ice to the melting point?

- 1000 cal
- -1000 cal
- 2000 cal
- -2000 cal

What is enthalpy (heat) of fusion?

- Amount of energy to raise temperature of 1g by 10
- Amount of energy needed to boil 1g
- Amount of energy needed to melt 1g

For the same amount of heat added, a substance with a large specific heat…

- Has a smaller increase in temp.
- Has a larger increase in temp.
- Has the same increase in temp.

What is the specific heat of a metal if 24.8 g absorbs specific heat…65.7 cal of energy and the temperature rises from20.2 C to 24.5 C?

- .62 cal/g C
- 78 cal/g C
- 66 cal/g C

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