Book edition 10th Edition

Author(s) David Halliday

Pages 1328 pages

ISBN 9781118230718

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Short Answer

We have seen that Q for the overall proton–proton fusion cycle is 26.7 MeV. How can you relate this number to the Q values for the reactions that make up this cycle, as displayed in Fig. 43-11?

The given Q-value 26.7 MeV is the total energy of the proton-proton fusion cycle.

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Write the given data

The Q-values for the individual reactions of the proton-proton fusion cycle in figure 43-11 are given.

Step 2: Determine the concept of Q-value

The Q-value of the fusion process is the amount of energy that is either absorbed or released during the process. Thus, it describes the integration process for a fusion process that involves the binding of two nuclei.

Formula:

The Q-value of a given full cycle is the sum of all the energy (or Q-value) of the reactions that contribute to the full cycle reaction as follows:

$Q = \sum_{i}^{n} Q_{i}$ …… (i)

Step 3: Calculate the Q-value of the overall proton-proton fusion cycle

Let, the Q-values of all the given individual reactions be $Q_{1} = 0.42 M e V$ , $Q_{2} = 1.02 M e V$ $Q_{3} = 5.49 M e V$ and $Q_{4} = 12.86 M e V$ . Thus, for the overall proton-proton fusion cycle, the total Q-value can be calculated using equation (i) as follows:

$Q = 2 Q_{1} + 2 Q_{2} + 2 Q_{3} + Q_{4} = 2 (0.42 M e V + 1.02 M e V + 5.49 M e V) + 12.86 M e V = 26.7 M e V$

Hence, the given value 26.7 MeV is the total energy of the proton-proton fusion cycle.

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Fundamentals Of Physics

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Short Answer

We have seen that Q for the overall proton–proton fusion cycle is 26.7 MeV. How can you relate this number to the Q values for the reactions that make up this cycle, as displayed in Fig. 43-11?

Step by Step Solution

Step 1: Write the given data

Step 2: Determine the concept of Q-value

Step 3: Calculate the Q-value of the overall proton-proton fusion cycle

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Fundamentals Of Physics

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Short Answer

We have seen that Q for the overall proton–proton fusion cycle is 26.7 MeV. How can you relate this number to the Q values for the reactions that make up this cycle, as displayed in Fig. 43-11?

Step by Step Solution

Step 1: Write the given data

Step 2: Determine the concept of Q-value

Step 3: Calculate the Q-value of the overall proton-proton fusion cycle

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