# Hydration reaction

Currently I'm measuring the rate of completion of a hydration reaction by putting a temperature probe in the middle of a cup full of reagents and measuring the temperature in an isolated box. The main reaction going on in the cup is:

$$\ce{CaSO4\cdot 0.5H2O + 3/2 H2O -> CaSO4*2H2O}$$

Now I'm planning to change from one type of cup to another kind of cup with a different volume and a different shape (that will also be completely filled). Will this influence the temperature profile of the reaction?

Cup 1 (with a volume of 192 ml):

Cup 2 (with a volume of 250 ml):

• Hello and welcome to Chemistry.SE. If you have any questions about the site please feel free to visit the help center. Best of luck! – airhuff Mar 22 '17 at 7:04
• @Fl.pf. Do you have something to back your answer up? Because I'm not gonna believe you if you simply say yes. – Michthan Mar 23 '17 at 14:06
• @Fl.pf. I can see that the generated heat would be different for a different volume, but that heat would also be spread over a different volume. Wouldn't this cancel out then? – Michthan Mar 23 '17 at 14:14
• @Michthan Over volume maybe. But if you change the shape aswell? Also you didn't state if you used the same amount of material for the different volume of cup. Maybe I don't understand exactly what you mean, but I don't think your question is written clearly enough (too much room for interpretation of what you really want to know). – Fl.pf. Mar 23 '17 at 14:32
• @Fl.pf. I'm leaving work now, but I'll add more specifications tomorrow to make the question more clear. – Michthan Mar 23 '17 at 14:47