Discussion
Heat of hydration is measured by
Answer: A
Correct answer: dissolving hydrated and unhydrated samples in acid and comparing
This is the heat of solution method. The heat released when unhydrated cement dissolves in acid, less the heat released when a hydrated sample of the same cement dissolves, is the heat the hydration itself gave out. It measures the total heat rather than the rate; isothermal conduction calorimetry is the alternative where the rate over the first days is what matters.
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