[streeter]

How do i calculate enthalpy change if i take 2.3 g of NaOH and dissolve it in 50.0 mL of water. The initial temperature was 24.2 C and the final temperature after it was dissolved was 34.9 C. The specific heat capacity was 4.18 J/g degree C

[JustinCh3m]

Use the numbers you have to find Q (or q), using q = mc(delta T).  Sometimes "c" is "s" (specific heat capacity) - depends on your text.

Now, what's the relationship between q and what you're asked to calculate (deltaH)??