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Published byCornelia Bridges Modified over 9 years ago
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Heating/Cooling Curve & Energy Calculations
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Which of the following measures the average kinetic energy of a sample? 1.Mass 2.Volume 3.Specific heat 4.Temperature 5.Heat of fusion Table
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The flat lines on a heating curve represent… 1.A temperature change. 2.A constant state of matter. 3.A change in state. 4.A Change in average kinetic energy Table
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The sloped lines on a heating curve represent… 1.A constant temperature. 2.A change in state of matter. 3.A constant state of matter. 4.A constant value for the average kinetic energy Table
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Which portion of the curve represents the solid melting? 1.1 2.2 3.3 4.4 5.5 Table Energy being added (cal) 500 200 60 10 0
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When does kinetic energy increase on a heating curve? 1.On the flat portions. 2.On the sloped lines. 3.Every point on the curve. Table
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What is enthalpy of fusion? 1.Amount of energy to raise temperature of 1g by 1 0 2.Amount of energy needed to boil 1g 3.Amount of energy needed to melt 1g Table
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What would be the freezing point temperature of this substance? 1.0 °C 2.10 °C 3.60 °C 4.200 °C 5.500 °C 6.Not listed Table Energy being added (cal) 500 200 60 10 0
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Which portion of the curve represents heating of the liquid? 1.1 2.2 3.3 4.4 5.5 Energy being added (cal) 500 200 60 10 0 Response
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For the same amount of heat added, a substance with a large specific heat… 1.Has a smaller increase in temp. 2.Has a larger increase in temp. 3.Has the same increase in temp. Table
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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? 1.1000 cal 2.-1000 cal 3.2000 cal 4.-2000 cal Table
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What is the specific heat of a metal if 24.8 g absorbs 65.7 cal of energy and the temperature rises from 20.2 C to 24.5 C? 1..62 cal/g C 2.78 cal/g C 3.66 cal/g C Table
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A hot-water bottle contains 750 g of water at 65 °C. If the water cools to body temperature (37 °C), calculate the energy transfer experienced by the water in the hot water bottle. 1.-23000 cal 2.-21000 cal 3.-20000 cal 4.2300 cal 5.2100 cal 6.20000 cal Table
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