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Unformatted text preview: 2 O = 1.0 cal/g C 3. (4 pts) You are lying on a 250 kg patch of sand in Rio that is slowly warming up as the day continues. In the morning it was 72.1 F and now it is 98.2 F. How many Joules of thermal energy were absorbed by the patch of sand? specific heat of sand 0.19 cal/g C (use your book to find the necessary conversions) 4. (4 pts) If you used the 2.0 x 10 3 Cal (Kcal) you expend in energy in 1 day to heat 7.00 x 10 4 g of water at 22 C, what would be the final temperature of the water? 5. (3 pts) Draw an energy diagram for the following reaction by labeling the reactants, products, activation energy, and heat of reaction. CH 4 (g) + 2O 2 (g) CO 2 (g) + 2H 2 O(l) + 211 kcal Energy Reaction Progress...
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- Fall '08