Energy in = 436 + 243 = 679 kJ/mol (this is the energy absorbed when the bonds of the reactants break). Energy out = 2 × 432 = 864 kJ/mol (this is the energy released when the bonds of the products ...

Borosilicate glass is made by heating sand with boron trioxide. Borosilicate glass has a much higher melting point than soda-lime glass. State and explain which type of glass would be best to make a ...