Réponse:
1.
∆m = m(Helium) + m(neutron) - m(deuterium)-m(tritium)
∆m = 6,64466.10-²⁷ + 1,67493.10-²⁷ - 3,34358.10-²⁷ - 5,00736.10-²⁷
∆m = - 3,135.10-²⁹ kg
2.
E = |∆m|c²
E = 3,135.10-²⁹ × (2,9979.10⁸)²
E = 2,818.10-¹² J
3.
Emol = N(A) × E
Emol = 6,02.10²³× 2,818.10-¹²
Emol = 1,70.10¹² J
