Explanation Given data: Refer to the FIGURE P10.53 in the textbook for the energy diagram of the H 2 molecule. Explanation: The photon energy required to dissociate the molecule of H 2 is equal to the bond energy of the hydrogen molecule. The bond energy in the energy diagram is the vertical distance from the minimum potential energy line to potential energy plateau on the right side of the equilibrium point (minimum potential energy point). From the given figure, the bond energy is the distance between the horizontal axis (since the minimum potential energy line is at the horizontal axis) and the energy line of 7 .5 × 10 − 19 J . Therefore, calculation the photon energy required to dissociate the molecule of H 2 as follows. Req photon energy = 7 .5 × 10 − 19 J − 0 J = 7 .5 × 10 − 19 J Write the conversion factor to convert the obtained energy in term of kilo joules per mole as follows. ( Req photon energy ) kJ mol = ( Req photon energy ) ( Avogadro's number ) (1) Here, Avogadro’s number is 6

MODIFIED MASTERING COLLEGE PHYSICS 18WK.

4th Edition

ISBN: 9780136782216

Author: Knight

Publisher: PEARSON

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Chapter 10, Problem 54P

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To find: The photon energy required to dissociate a molecule of H2.

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Chapter 10, Problem 53P

Chapter 10, Problem 55P

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Chapter 10 Solutions

MODIFIED MASTERING COLLEGE PHYSICS 18WK.

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The photon energy required to dissociate a molecule of H 2 .

To find: The photon energy required to dissociate a molecule of H2.

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Chapter 10 Solutions