Heating Curves and Specific Heat

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# Heating Curves and Specific Heat - PowerPoint PPT Presentation

Heating Curves and Specific Heat. 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.

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### Heating Curves and Specific Heat

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/gC°, 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
• 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 absorbs65.7 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