4. How much heat (in J) is given out when 85.0 g of lead cools from 200.0 °C to 10.0 °C? (Clead = 0.129 J/g °C) (2080 J) ° ° 5. If it takes 41.72 joules to heat a piece of gold weighing 18.69 g from 10.0 C to 27.0 C, what is the specific heat of the gold?
(0.131 J/gOC) 6. If 35 g of a substance absorbs 4000 J of heat when the temperature rises from 25 to 5100C, what is the specific heat of that substance?
(0.235 J/gOC) 7. A certain mass of water was heated with 41,840 Joules, raising its temperature from 22.0 °C to 28.5 °C. Find the mass of water.
(1540 g) 8. Calculate the number of joules given off when 32.0 grams of steam cools from 90 degrees celsius to 31 degrees celsius.
(3800 J) 9. How many joules of heat are lost by 3580 kilograms of granite as it cools from 41.2 C to -12.9 O C? The specific heat of granite is 0.803 J/gOC O
(1.56 x 108 J) 10. In reality we are making a lot of assumptions for these calculations to be accurate. For example, in many cases we are assuming a perfectly insulated container. List two other assumptions we are making in these calculations. 1. 2.
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