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Question

Question: 1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released...

1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is

A

63 × 107J

B

63 × 1010J

C

63 × 1014J

D

63 × 1020J

Answer

63 × 1010J

Explanation

Solution

∆m = 1 – 0.993 = 0.007 gm

∴ E = ∆mc2 = 0.007 × 10–3 × (3 × 108)2 = 63 × 1010 J