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AGC/United Learning • 1560 Sherman Ave., Suite 100 • Evanston, IL 60201 • 800-323-9084

  • 15.

    This increases the surface area to volume ratio provid- ing a more efficient burn.

  • 16.

    useful output energy = Q = mct = (500 g x 4.19 J/ g°C x 75.0°C)

input energy = (25.0 g x 43 kJ/g) % efficiency = useful output energy / input energy x 100 =[(500 g x 4.19 J/g°C x 75.0°C) / (25.0 g x 43 kJ/g)] x

100 % efficiency =

15%

17. The pot, the atmosphere surrounding the stove and pot, and parts of the stove all absorbed some of the thermal energy.

13

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