Answer Happy

When a 25.00-g sample of solid sodium hydroxide dissolves in 150.00 g of water in a coffee-cup calorimeter, the temperature rises from 25.00 °C to 50.80 °C. The following Figure is an illustration of a coffee-cup calorimeter: Thermometer Glass stirrer Cork stopper Two Styrofoam cups nested together Reaction mixture in solution Which of the following AH (in kJ/mol NaOH) is true for this solution process ?

Which of the following AH (in kJ/mol NaOH) is true for this solution process? NaOH(s) Na+ (aq) + OH(aq) atomic element mass mol Na 22.98977 O 15.9994 H 1.0079 Ο ΔΗ == - 73.10 Ο ΔΗ = -1699 mol Ο ΔΗ -30.22 kJ mol O +30.22 kJ Ο ΔΗ = + 373.10 mol kJ mol kJ mol