What is a standard state? What is the standard enthalpy

Chapter 6, Problem 27E

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Problem 27E

What is a standard state? What is the standard enthalpy change for a reaction?

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QUESTION:

Problem 27E

What is a standard state? What is the standard enthalpy change for a reaction?

ANSWER:

Solution: According to Planck’s quantum theory of radiation, the amount of energy associated with a quantum(in case of light, the quantum of energy is often called photon) of radiation is proportional to the frequency of light, E = h ---(1), where h is a universal constant called Planck’s constant. is the frequency and E is the energy of a photon. Or, E = hc/ -------(2), where, is the wavelength of light and c is the velocity. Step1: Given, wavelength of the light = 3.3 m -6 -6 = 3.3 x 10 m[1 m = 10 m] M

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