Hydration of which ceramic compound is most responsible for the initial, most significant, and most rapid hardening of cement within concrete that has been mixed and poured (and is therefore undergoing the induction stage of curing)?

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.