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

Blackline Masters #9a-9d: Post-Test

Multiple Choice

  • 1.

    b. kinetic or potential

  • 2.

    b. work

  • 3.

    a. 1.47 kJ

  • 4.

    d. bomb calorimeter

Long Answer

1. Chemical potential energy is converted into kinetic

energy and thermal energy in both cases.

  • 2.

    kinetic energy

  • 3.

    the first law of thermodynamics; law of conservation

of energy

  • 4.

    kinetic energy

  • 5.

    kinetic energy

  • 6.

    light energy

  • 7.

    the desired output energy

  • 8.

    waste

  • 9.

    % efficiency = useful output energy / input energy x

=

(7.51 J / 950 J) x 100

% efficiency =

0.791 J

11.

input

useful output

waste

100 10. % efficiency = useful output energy / input energy x

100

a light bulb turned on a moving car

electrical energy chemical potential

light energy kinetic energy

heat heat, sound

12. % efficiency

= useful output energy /

useful output energy

input energy x 100 = % efficiency x input energy

useful output energy

/100 = (30% x 11 kJ) / 100 = 3.3 kJ

  • 13.

    phototropis

  • 14.

    % efficiency

m

= useful output energy / input energy x 100

useful output energy

= % efficiency x input energy

/ 100 = [27.5% x (2.50 L x 33.5 MJ/L)] / 100

useful output energy

= 23.0 MJ 12

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