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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.

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Presentation Transcript
the flat lines on a heating curve represent
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
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
When does kinetic energy increase on a heating curve?
  • On the flat portions.
  • On the sloped lines.
  • Every point on the curve.
slide6

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
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
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.
slide10
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
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