Specific Heat Capacity and Heat Transfer

What are the units for specific heat capacity?

• J / g °C
• J g / °C
• J g °C
• 1 / J g °C

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25 °C to 175 °C. Calculate the specific heat capacity of iron.    

• 0.46 J / g ^oC
• 1.65 J / g ^oC
• 2.59 J / g ^oC
• 3.39 J / g ^oC

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NGSS.HS-PS3-4

How much heat is needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/g °C? (Make sure your answer has the right units)

• 297 J
• 0.003 J
• 297 J / g °C
• 0.003 J / g °C

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A 0.3 g piece of copper is heated and fashioned into a bracelet.  The amount of energy transferred by heat to the copper is 66,300 J.  If the specific heat of copper is 390 J / g °C, what Is the change of the copper's temperature? 

• 566.7 °C
• 96.7 °C
• 390.7 °C
• 406.7 °C

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A 12.5 gram piece of iron (c = 0.45 J / g °C) has an initial temperature of  100° C.
When the iron loses exactly 25 J of energy, its final temperature is ____, and this is an ____ process.

• -4.4 °C, exothermic
• -4.4 °C, endothermic
• 95.6 °C , exothermic
• 95.6 °C , endothermic

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How many Joules of energy are required to change 10 grams of liquid water from 20 °C to 90 °C? Specific heat of liquid water is 4.18 J / g °C. 

• 1400 J
• 2800 J
• 210,000 J
• 1,400,000 J

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NGSS.HS-PS3-4

The specific heat of aluminum is 0.21 J / g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J
• 10.5 J
• 1.05 J

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20 g of water (specific heat of water is 4.18 J / g °C) undergoes a temperature change from 25° C to 20° C. How much heat energy moved from the water to the surroundings?

• 418 J
• 209 J
• 83 J
• 4.18 J

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The specific heat(c) of copper is 0.39 J / g °C. What is the temperature change (∆T) when 100 Joules of heat is added to 20 grams of copper?

• 12.82 °C
• 24.12°C
• 35.91 °C
• 9.93 °C

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