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A light emitting diode (L.E.D.) emits photons with an energy of #2.84 xx 10^-19# J. What is the energy per mole of photons emitted?

Answer 1

The molar energy of the photons is 171 kJ/mol.

Just as a dozen is twelve of anything, so a mole is Avogadro's number = #6.02×10^{23}# of anything. So the energy of the given light beams may be rendered as

#(2.84×10^{-19}"J")×({6.02×10^{23}}/{"mole"})=1.71×10^5{"J"}/{"mole"}#.

Given that light frequently initiates chemical reactions, this energy is comparable in magnitude to that of chemical reactions. A real-world example of this can be found at https://tutor.hix.ai

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Answer 2

Jeremiah Adams

The energy per mole of photons emitted by the LED is (1.71 \times 10^5 , \text{J/mol}).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.