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Chapter 3: Q.3.84 (page 93)
What is in degrees Celsius and in kelvins?
In Celcius =and in kelvins =
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Substances A and B are the same mass and at the same initial temperature. When they are boated, the final terafeature of is higher than the temperature of . What does this iell you about the specific heats of and ?
Calculate the heat change at for each of the following and indicate whether heat was absorbed/released:
a. calories to vaporize g of water
b. joules to vaporize g of water
c. kilocalories to condense kg of steam
d. kilojoules to condense g of steam
A high-protein diet contains of carbohydrate, of fat, and of protein. How much energy, in kilocalories and kilojoules, does this diet provide? (Round off the answer for each food type to the tens place.)
Classify each of the following as a pure substance or a mixture:
a. a soft drink
b. propane
c. a cheese sandwich
d. an iron () nail
e. salt substitutelocalid="1651731802252"
A person useson a long walk. Calculate the energy used for the walk in each of the following energy units:
joules
kilojoules
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