Question

A student dissolves of sodium hydroxide in of water in a well-insulated open cup. He then observes the temperature of the water rise from to over the course of minutes. Use this data, and any information you need from the ALEKS Data resource, to answer the questions below about this reaction: ()()() You can make any reasonable assumptions about the physical properties of the solution. Be sure answers you calculate using measured data are rounded to the 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 known and published values for this reaction.

Is this reaction exothermic, endothermic, or neither?
a. exothermic
b. endothermic
c. neither

Answer 1

Answer: a. exothermic

Step-by-step explanation:

An Endothermic reaction is a type of chemical reaction in which energy is absorbed from the surrounding. The temperature of the surrounding decreases.

An Exothermic reaction is a type of of chemical reaction in which energy is released into the surrounding. The temperature of the surrounding increases.

When sodium hydroxide is dissolved in water, the temperature of water rise which means the heat has been released during dissolution of sodium hydroxide, thus the reaction is exothermic.