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It was 10g of NaOH. 10g/(40g/mol) = 0.25 mol, whereas HCl was 100mL at 2M=0.2 mol so HCl was limiting reagent. I don't think it actually matters for your temp since either way only 0.2mol of water is neutralised but maybe they'll dock a mark for wrong limiting reagent.

This is my take on the Q16 reactor question and why it's only A if it's still disputed.

3 roots for the derivative graph so 3 stationary points

I got 3 for 10 but I'm not sure whether the middle one is a cusp or not, I'll do some investigating when i get home. EDIT: It seems its continuous for the middle st pt so it's 3