How much energy is released as 1kg of hydrogen is consumed?

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The discussion centers on calculating the energy released from the fusion of 1 kg of hydrogen, referencing the fusion reaction occurring in the sun. A participant calculated the energy using mass differences and the conversion factor of 931.5 MeV, arriving at 25.708 MeV, which contradicts the expected value of 6 x 10^14 J. The discrepancy is attributed to the use of average atomic masses instead of standard values for isotopes in the calculations. Participants suggest ensuring accurate mass values for isotopes to resolve the issue. Accurate calculations are crucial for understanding energy release in fusion reactions.
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15. The following fusion reaction takes place in the sun and furnishes much of its energy:
, where is a positron. How much energy is released as 1kg of hydrogen is consumed? The masses of 1H, 4He, and are, respectively, 1.007825, 4.002604, and 0.000549 u, where atomic electrons are included in the first two values

I do it by finding the difference of mass between the parent nucleus and daughter nucleus and multiply with 931.5MeV. The answer I got is 25.708MeV,which is actually different with the given answer, 6 x 10^14 J. Why?
Which part I have done wrongly?
 
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This might give you a clue:

^{1}_{1}H+^{1}_{1}H\xrightarrow~^{2}_{1}H + p

Try and use standard value for isotopes not the average.
 
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