1 / 2
0
Views
0
Downloads
0.0
0
Save
0 Likes
Hess's Law Worksheet: Calculate Enthalpy Changes in Chemistry
0 Views
0 Downloads
Paste this activity's link or code into your existing LMS (Google Classroom, Canvas, Teams, Schoology, Moodle, etc.).
Students can open and work on the activity right away, with no student login required.
You'll still be able to track student progress and results from your teacher account.
Information
Description
What It Is:
This is a Hess's Law worksheet featuring two problems. The first problem asks students to calculate the energy required to make dianthracene (C₂₀H₁₂). It provides the overall reaction and two intermediate reactions with their corresponding ΔH values. The second problem requires students to find the heat of reaction for the process of 3 FeCl₂ → Fe + 2 FeCl₃, again providing intermediate reactions and their ΔH values.
Grade Level Suitability:
This worksheet is suitable for high school students, specifically grades 11-12, and introductory college chemistry courses. It requires a solid understanding of stoichiometry, thermochemistry, and Hess's Law principles, which are typically covered in these grades.
Why Use It:
This worksheet provides practice in applying Hess's Law to calculate enthalpy changes for reactions. It reinforces the concept that enthalpy change is a state function and helps students develop problem-solving skills in thermochemistry. It provides examples that involve manipulating and combining reactions to find the enthalpy change of a target reaction.
How to Use It:
Students should use the provided intermediate reactions and their enthalpy changes (ΔH values) to manipulate them algebraically. This involves reversing reactions (changing the sign of ΔH) and multiplying reactions by coefficients (multiplying the ΔH by the same coefficient) until the intermediate reactions sum up to the overall reaction. Then, they can sum up the manipulated ΔH values to find the ΔH of the overall reaction.
Target Users:
The target users are high school chemistry students (grades 11-12) and introductory college chemistry students who are learning about thermochemistry and Hess's Law. It is also useful for teachers looking for practice problems to assign to their students.
This is a Hess's Law worksheet featuring two problems. The first problem asks students to calculate the energy required to make dianthracene (C₂₀H₁₂). It provides the overall reaction and two intermediate reactions with their corresponding ΔH values. The second problem requires students to find the heat of reaction for the process of 3 FeCl₂ → Fe + 2 FeCl₃, again providing intermediate reactions and their ΔH values.
Grade Level Suitability:
This worksheet is suitable for high school students, specifically grades 11-12, and introductory college chemistry courses. It requires a solid understanding of stoichiometry, thermochemistry, and Hess's Law principles, which are typically covered in these grades.
Why Use It:
This worksheet provides practice in applying Hess's Law to calculate enthalpy changes for reactions. It reinforces the concept that enthalpy change is a state function and helps students develop problem-solving skills in thermochemistry. It provides examples that involve manipulating and combining reactions to find the enthalpy change of a target reaction.
How to Use It:
Students should use the provided intermediate reactions and their enthalpy changes (ΔH values) to manipulate them algebraically. This involves reversing reactions (changing the sign of ΔH) and multiplying reactions by coefficients (multiplying the ΔH by the same coefficient) until the intermediate reactions sum up to the overall reaction. Then, they can sum up the manipulated ΔH values to find the ΔH of the overall reaction.
Target Users:
The target users are high school chemistry students (grades 11-12) and introductory college chemistry students who are learning about thermochemistry and Hess's Law. It is also useful for teachers looking for practice problems to assign to their students.
