Exam (elaborations)

Finding the mentally change of Mg when it reacts with O gas - Lab Report.pdf

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Course
Chemistry

Institution
12th Grade

"Finding the Mental Change of Mg When It Reacts with O Gas - Lab Report" offers an insightful exploration into the chemical reactions between magnesium (Mg) and oxygen (O₂). This engaging lab report investigates the transformative process that occurs when magnesium encounters oxygen gas, shedding...

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Uploaded on May 17, 2024
Number of pages 9
Written in 2023/2024
Type Exam (elaborations)
Contains Questions & answers

Institution Secondary school
Education 12th Grade
Course Chemistry
School year 1

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SCH4U Chemistry

Laboratory #1: Finding The Enthalpy Change of Magnesium when it reacts with
Oxygen Gas

Submitted By: first and last name

Partner: first and last name

October 18, 2023

Instructor: first and last name

, Introduction

In the pursuit of understanding chemical reactions and the principles governing them,

this laboratory seeks to delve into the investigation of the Heat of Reaction for the Combustion

of Magnesium, guided by the fundamental principles of thermochemistry, specifically Hess's

Law, a result of the first law of thermodynamics, which states that the heat of reaction (ΔH) is

the algebraic sum of the heats of other reactions involved in a sequence. This law, which has

held true for a wide range of chemical reactions, allows us to determine the heat of a reaction,

which is the energy that is released or absorbed when chemicals are transformed in a chemical

reaction, indirectly by summing the heats of related reactions. The specific reaction under

scrutiny involves the combustion of magnesium, which is when an element reacts with O2(g)

and is a process represented by the equation: Mg (s) + ½ O2(g) ⇒ MgO (s), a process known

for its rapid release of light and heat. To tackle this challenging measurement, a metal

calorimeter is used. The journey towards understanding this scientific principle is paved with two

distinct reactions: one involving magnesium oxide and hydrochloric acid, and the other featuring

magnesium metal and hydrochloric acid. Through experimental procedures involving calorimetry

and temperature measurements, the aim is to not only reveal the heat of these individual

reactions but also to confirm the principles of Hess's Law and acquire valuable insights into the

heat of combustion for magnesium.

Materials

● 200mL Beaker

● 100mL Graduated Cylinder

● Two Styrofoam Cups

● Metal Calorimeter

● Measuring Scale

1

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