Sustainable Energy
Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 6, Problem 7P
To determine

Find the energy released in the decay process.

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(a) What is the physical significance of energy of activation ? Explain with diagram.(b) In general, it is observed that the rate of a chemical reaction doubles with every 10 degree rise in temperature. If the generalization holds good for the reaction in the temperature range of 295 K to 305 K, what would be the value of activation energy for this reaction ?[R = 8.314 J mol-1 K-1]
We have an initial amount of H3N2Cl4 of 72 milligrams, and a half-life of 60 days. Find the decay constant, k, and determine how long it takes for 95% of the material to decay.
For the solidification of iron, calculate the critical radius r* and the activation free energy AG* if nucleation is homogeneous. Values for the latent heat of fusion and surface free energy are -1.85 x 10° J/m³ and 0.204 J/m?, respectively. Use the supercooling value AT = 291 K, and the melting point of iron is 1538°C. Calculate the number of atoms found in a nucleus of critical size. Assume a lattice parameter of 0.292 nm for solid iron at its melting temperature.
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