02-25-13 Energy Worksheet 2 Units ACh.pdf - Whitnall High School
02-25-13 Energy Worksheet 2 Units ACh.pdf - Whitnall High School
02-25-13 Energy Worksheet 2 Units ACh.pdf - Whitnall High School
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<strong>ACh</strong> Name ____________________________________ Hr _____<strong>Energy</strong> <strong>Worksheet</strong> 3: Heat <strong>Units</strong> and ConversionsUse the dimensional analysis grid for the following unit conversions.Memorize these conversion factors: 1 cal = 4.184 J 1,000 cal = 1 Cal 1 kJ = 1,000 J1. 1,275 cal to Cal2. 1,275 cal to joules3. 5,375 J to cal4. 4,650 J to kJ5. 38 cal to J6. The unit for food energy is ( cal Cal J ).7. Circle all of the following that are units for heat energy: Cal K J calo C8. Heat is a transfer of energy due to differences in temperature. ( true false )
9. Convert 1,520 cal to joules10. Convert 2.20 kJ to calories11. An exothermic reaction releases 375 J. How many calories are released?12. The label on Keebler’s Toffee Shortbread cookies says that 31 grams (2 cookies) contain 160 Calories.How many joules is this?<strong>13</strong>. How many kilojoules are there in the cookies described in #7?
<strong>ACh</strong> Name ____________________________________ Hr _____Ch Sample Problems to be used for specific heat capacity worksheet.
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