Platinum, Which Is Widely Used as a Catalyst, Has a Work

question 14

Multiple Choice

Platinum, which is widely used as a catalyst, has a work function (the minimum energy needed to eject an electron from the metal surface) of 9.05 × 10-¹⁹ J. What is the longest wavelength of light which will cause electrons to be emitted?

• A) 2.196 × 10^-7 m
• B) 4.553 × 10^-6 m
• C) 5.654 × 10² m
• D) 1.370 × 10¹⁵ m
• E) > 10⁶ m

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Definitions:

Exergonic

Describing a chemical reaction that releases energy to its surroundings, typically in the form of heat or work.

Endergonic

Endergonic refers to a chemical reaction where energy is absorbed from the surroundings, generally requiring an input of energy to proceed.

Hydrolysis

A chemical reaction in which water is used to break down the bonds of a particular substance.

Activation Energy

The minimum amount of energy required to initiate a chemical reaction.