AP+Chem+NaOH+Enthalpy

NaOH Enthalpy

NaOH(s) --> NaOH(aq) ~2g

NaOH(aq) + HCl(aq) --> NaCl(aq) + H2O(l) 50ml of 1M 50ml of 1M

NaOH(s) + HCl(aq) --> NaCl(aq) + H2O(l) 2.0g 100ml

17.1˚ NaOH || 13.0˚ ||
 * Measure: || 1 || 2 || 3 ||
 * Mass (volume) of NaOH || 2.151g || 50ml || 2.033g ||
 * Volume of surroundings || 50ml || 50ml || 100ml ||
 * Ti || 11.5˚ || 12.9˚ HCl
 * Tf || 20.5˚ || 21.0˚ || 25˚ ||

1) q = mc∆T q = (50)(9)(4.18) q = 1881 J

2) q = (100)(6)(4.18) q = 2508 J

3) q = (100)(12)(4.18) q = 5016 J

∆H = -35 kJ/mol ∆H = -50 kJ/mol ∆H = -99 kJ/mol