Home ATOMS NUCLEUS Previous year Questions 1 g of hydrogen is converted into 0.993 g of helium in a thermonuclear reaction. The energy released is

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

[EAMCET (Med.) 1995; CPMT 1999]

(a) 63 * 10⁷ J (b) 63 * 10¹⁰J (c) 63 * 10¹⁴ J (d) 63 * 10²⁰ J

Solution:

Mass of Hydrogen Gas is 1 g

Mass of Helium is 0.993 g

Therefore,

$\left (\Delta m \right )= 0.007 gm$

The amount of energy released in this process is

$E=\Delta m*C^2$

$E=\left (\0.007*10^{-3} \right )*\left (3*10^{8} \right )^2$

$E=\left (\7*10^{-6} \right )*\left (9*10^{16} \right )$

$E=7*9*10^{10}$

$E=63*10^{10}$

The correct option is 'B'

Milan Tomic

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