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Heating Curves and Specific Heat

Heating Curves and Specific Heat. The math begins!. The flat lines on a heating curve represent…. A temperature change. A constant state of matter. A change in state. A slope of 0. 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

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  1. Heating Curves and Specific Heat The math begins!

  2. The flat lines on a heating curve represent… • A temperature change. • A constant state of matter. • A change in state. • A slope of 0.

  3. The sloped lines on a heating curve represent… • A constant temperature. • A change in state of matter. • A constant state of matter. • A positive slope.

  4. Which portion of the curve represents the solid melting? • 1 • 2 • 3 • 4 • 5

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

  6. 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

  7. What is enthalpy 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

  8. Which portion of the curve represents heating of the liquid? • 1 • 2 • 3 • 4 • 5

  9. 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.

  10. 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

  11. A hot-water bottle contains 750 g of water at 65 °C. If thewater cools to body temperature (37 °C), how many calories of heat could be transferred to sore muscles? • 23000 cal • 21000 cal • 20000 cal

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