1. The phase change between graphite and diamond is difficult to observe directly. Both substances can be burned, however. From these equations, calculate AH for the conversion of diamond into graphite. C(s, graphite) + 0:(g) → CO2(g) C(s, diamond) + O2(g) → CO2(g) AH = -393.51 kJ AH = -395.94 kJ

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Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.