What is Q value of a nuclear reaction?

The Q value of a nuclear reaction A + b to C + d is defined by Q = [m_A + m_b – m_C – m_d]c^2 where the masses refer to the respective nuclei. Determine from the given data the Q-value of the following reactions and state whether the reactions are exothermic or endothermic. (i) ""_(1)^(1)H + ""_(1)^(3)H to _(1)^(2)H + _(1)^(2)H (ii) ""_(6)^(12)C + ""_(6)^(12)C to ""_(10)^(20)Ne + ""_(2)^(4)He Atomic masses are given to be m (""_(1)^(2)H) = 2.014102 u m (""_(1)^(3)H) = 3.016049 u m (""_(6)^(12)C ) = 12.000000 u m (""_(10)^(20)Ne ) = 19.992439 u .

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Calculate Q value of the following nuclear reaction 13^(Al^(27)) + 2^(He^(4)) rarr 14^(Si^(30)) + 1^(H^(1)) + Q. The exact mass of 13^(Al^(27)) is 26.9815 amu, 14^(Si^(30)) is 29.9738, 2^(He^(4)) is 4.0026 amu and 1^(H^(1)) is 1.0078 amu.