8 Homework 10 Question 13 of 21 (1 point) I Question Attempt: 1 of Unlimited 10 1 11 12 13 Is this reaction exothermic, endothermic, or neither? 14 Calculate the reaction enthalpy AHxn per mole of NaCl. 15 If you said the reaction was exothermic or endothermic, calculate the amount of heat that was released or absorbed by the reaction in this case. A student dissolves 10.7 g of sodium chloride (NaCl)in 300. g of water in a well-insulated open cup. He then observes the temperature of the water fall 21.0 °C to 20.4 °C over the course of 3.1 minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: NaCl(s) Na (aq) + Cl¯ (aq) You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded correct number of significant digits. Note for advanced students: it's possible the student did not do the experiment carefully, and the values you calculate may not be the same as the know published values for this reaction. 16 exothermic endothermic neither kJ 17 kJ mol 18 x10 = 19 5