Title

The Effect Of Neutralization On Heat Change And Entropy

Author(s)

Jake Sawyer

School Name

Heathwood Hall Episcopal School

Grade Level

10th Grade

Presentation Topic

Chemistry

Presentation Type

Non-Mentored

Abstract

Entropy is the amount of energy being released from a system at any given time by way of light or heat. Being one of the many thermodynamic properties of matter, everything in the universe exudes some sort of light or heat at all times, but certain processes and reactions cause a greater change in entropy than others. The purpose of this experiment is to test the effect of a neutralization reaction between Hydrochloric Acid(HCl) and the base, Sodium Hydroxide(NaOH) on the entropy of their surroundings. The manipulated variable was molarity because the difference in pH between 1 molar, 2 molar, and 4 molar bases and acids was negligible. The raw Data was measured in Change in Kelvin(or celsius). The data in terms of temperature change showed an upward trend as the molarity of the acids and bases were increased, but the Hydrochloric acid seemed to have a much larger effect on the change in temp than the sodium hydroxide. The heat energy released(and therefore the change in entropy) was much greater as the molarity rose showing that neutralization did in fact have a measurable effect on entropy.

Location

Owens 101

Start Date

4-16-2016 11:00 AM

COinS
 
Apr 16th, 11:00 AM

The Effect Of Neutralization On Heat Change And Entropy

Owens 101

Entropy is the amount of energy being released from a system at any given time by way of light or heat. Being one of the many thermodynamic properties of matter, everything in the universe exudes some sort of light or heat at all times, but certain processes and reactions cause a greater change in entropy than others. The purpose of this experiment is to test the effect of a neutralization reaction between Hydrochloric Acid(HCl) and the base, Sodium Hydroxide(NaOH) on the entropy of their surroundings. The manipulated variable was molarity because the difference in pH between 1 molar, 2 molar, and 4 molar bases and acids was negligible. The raw Data was measured in Change in Kelvin(or celsius). The data in terms of temperature change showed an upward trend as the molarity of the acids and bases were increased, but the Hydrochloric acid seemed to have a much larger effect on the change in temp than the sodium hydroxide. The heat energy released(and therefore the change in entropy) was much greater as the molarity rose showing that neutralization did in fact have a measurable effect on entropy.