Vernier Software and Technology
Vernier Software & Technology

Endothermic and Exothermic Reactions

Figure from experiment 5 from Physical Science with Vernier

Introduction

Some chemical reactions absorb energy and are called endothermic reactions. Many chemical reactions give off energy. Chemical reactions that release energy are called exothermic reactions. You will study one endothermic reaction and one exothermic reaction in this experiment.

In Part I, you will study the reaction between citric acid solution and baking soda. An equation for the reaction is

{{\text{H}}_{\text{3}}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{{\text{O}}_{\text{7}}}{\text{(aq)  +  3 NaHC}}{{\text{O}}_{\text{3}}}{\text{(s)}} \to {\text{3 C}}{{\text{O}}_{\text{2}}}{\text{(g)  +  3 }}{{\text{H}}_{\text{2}}}{\text{O(l)  +  N}}{{\text{a}}_{\text{3}}}{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{5}}}{{\text{O}}_{\text{7}}}{\text{(aq)}}

In Part II, you will study the reaction between magnesium metal and hydrochloric acid. An equation for this reaction is

{\text{Mg(s)  +  2 HCl(aq)}} \to {{\text{H}}_{\text{2}}}{\text{(g)  +  MgC}}{{\text{l}}_{\text{2}}}{\text{(aq)}}

Objectives

In this experiment, you will

  • Observe two chemical reactions.
  • Measure temperature changes.
  • Determine the change in temperature, Δt, for each of the reactions.
  • Identify endothermic and exothermic reactions.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Standards Correlations

See all standards correlations for Physical Science with Vernier »

Physical Science with Vernier

See other experiments from the lab book.

1Temperature Probe Response Time
2Boiling Temperature of Water
3Freezing and Melting of Water
4Evaporation of Alcohols
5Endothermic and Exothermic Reactions
6Neutralization Reactions
7Mixing Warm and Cold Water
8Heat of Fusion
9Energy Content of Fuels
10Energy Content of Foods
11Absorption of Radiant Energy
12An Insulated Cola Bottle
13A Good Sock
14Insolation Angle
15Solar Homes and Heat Sinks
16Conducting Solutions
17Conductivity of Saltwater: The Effect of Concentration
18Acid Strengths
19Frictional Forces
20First-Class Levers
21Pulleys
22An Inclined Plane
23Reflectivity of Light
24Polarizing Light
25How Bright is the Light?
26Electromagnets: Winding Things Up
27Magnetic Field Explorations
28Household Acids and Bases
29Acid Rain
30Gas Pressure and Volume
31Gas Temperature and Pressure
32Fun with Pressure
33Lemon "Juice"
34Simple Circuits
35Graphing Your Motion
36Speeding Up
37It's Race Day
38Crash Lesson
39Newton's Second Law
40Falling Objects

Experiment 5 from Physical Science with Vernier Lab Book

<i>Physical Science with Vernier</i> book cover

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