Explanation Given: Wavelength of the given light ( λ ) is 6 .5 μm . Energy (power) of the heat lamp ( E ) is 32 .8 J . Explanation: The speed of light ( c ) is 3 × 10 8 m/s . Planck’s constant ( h ) is 6.626 × 10 − 34 J s . One micrometer is equal to 10 − 6 m. Convert micrometers to meters as follows: 6 .5 μm = 6 .5 μm × 10 − 6 m 1 nm = 6.5 × 10 − 6 m So, the energy of heat lamp E heat lamp is 32 .8 J . The energy of photons is given as follows: E photon = h c λ Substitute 3 × 10 8 m/s for c , 6.626 × 10 − 34 J s for h , and 6

Chemistry: A Molecular Approach Selected Solutions Manual, Books a la Carte Edition

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ISBN: 9780134554259

Author: Nivaldo J. Tro

Publisher: PEARSON

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Chapter 7, Problem 44E

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To calculate: The number of photons emitted by the heat lamp per second.

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Chapter 7, Problem 43E

Chapter 7, Problem 45E

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Chemistry: A Molecular Approach Selected Solutions Manual, Books a la Carte Edition

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