a What is the total amount of heat evolved in this reaction Show all work 3

# A what is the total amount of heat evolved in this

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a)What is the total amount of heat evolved in this reaction? Show all work. (3 points)
7. Imagine you are at a local water park on a hot summer day and your feet begin to get hot from the cement. Looking ahead, you notice that there are two paths you can take to your favorite waterslide. One path is comprised of sand while the other path consists of water. You opt for the water path because you know it will be cooler on your feet. Assuming that both paths were exposed to the same heat source (the sun) and that both paths have the same mass, explain why water does not get as hot as sand. (2 points) Sand has more thermal conductivity than water does, so when heat is transferred to the sand or water, the sand conducts the heat more leading to a higher temperature. The specific heat of water is 4.182 kJ being greater than the specific heat of sand which is .83 kJ and this causes the water to cool quicker than sand. Sand contains color, so the radiation will be heated higher than the water because water is colorless prevent it to get hot .

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• Fall '11
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