Hess’s law - Study guides, Class notes & Summaries

CHEM 103 MODULE 3 NOTES. 3.1: THERMOCHEMISTRY Thermodynamics is the study of the relationship between heat and other forms of energy, particularly mechanical work. Thermochemistry is the part of thermodynamics that deals with the quantity of heat given off or absorbed during a chemical reaction. The quantity of heat given off or absorbed during a physical change or temperature change can also be studied, and we will refer to this process as calorimetry. In order to adequately discuss thermoch...

This document provides a comprehensive summary of Units 1-14 of OCR A Level Chemistry, covering key foundational topics essential for exam success: Unit 1 - Moles, Equations, and Acids: Focuses on the mole concept, stoichiometry, and acid-base reactions. It covers calculations involving moles, concentration, and key equations. Unit 2 - Atomic Structure: Explores the structure of atoms, electron configurations, and atomic models. Key concepts include isotopes, ionization energy, and periodi...

CHEM 103 MODULE 3 NOTES. 3.1: THERMOCHEMISTRY Thermodynamics is the study of the relationship between heat and other forms of energy, particularly mechanical work. Thermochemistry is the part of thermodynamics that deals with the quantity of heat given off or absorbed during a chemical reaction. The quantity of heat given off or absorbed during a physical change or temperature change can also be studied, and we will refer to this process as calorimetry. In order to adequately discuss thermoch...

MCAT 4 REHEARSAL Physical Sciences, Verbal Reasoning, Writing Sample, Biological Sciences Contents: Physical Sciences Passage I Capacitors Passage II Electrochemistry Independent questions Passage III Electricity Passage IV Electrophoresis Passage V Refraction Independent questions Passage VI Hess’s Law Passage VII Standing waves Independent questions Verbal Reasoning Writing Sample Biological Sciences Passage I Kidneys Passage II Carbohydrates Independent questions Passag...

Adiabatic walls: no energy may be transferred as heat between the system and the surroundings → no heat added or removed and no change in entropy ○ ∆U=-W; ∆S=0 ● Diathermal walls: the temperature of the system and the surroundings are the same (thermal equilibrium: the surroundings are sufficiently large so that their heat capacity is infinite and they can transfer heat to or from the surroundings with no change in temperature) ○ Isothermal means that the system is in thermal equili...

CHEM 103 MODULE 3 NOTES. 3.1: THERMOCHEMISTRY Thermodynamics is the study of the relationship between heat and other forms of energy, particularly mechanical work. Thermochemistry is the part of thermodynamics that deals with the quantity of heat given off or absorbed during a chemical reaction. The quantity of heat given off or absorbed during a physical change or temperature change can also be studied, and we will refer to this process as calorimetry. In order to adequately discuss thermoch...

CHEM 103 MODULE 3 NOTES. 3.1: THERMOCHEMISTRY Thermodynamics is the study of the relationship between heat and other forms of energy, particularly mechanical work. Thermochemistry is the part of thermodynamics that deals with the quantity of heat given off or absorbed during a chemical reaction. The quantity of heat given off or absorbed during a physical change or temperature change can also be studied, and we will refer to this process as calorimetry. In order to adequately discuss thermoch...

Thermodynamics in A-Level Chemistry involves the study of energy changes, particularly in chemical reactions. Here's a brief summary of the key concepts: 1. Enthalpy (H) Enthalpy Change (ΔH): The heat energy change measured under constant pressure. Exothermic Reactions: Release heat to the surroundings, ΔH is negative (e.g., combustion). Endothermic Reactions: Absorb heat from the surroundings, ΔH is positive (e.g., photosynthesis). 2. Standard Enthalpy Changes Standard Conditions: 2...

This document provides detailed notes for Chemistry I’s chapter on thermochemistry. It contains information on calorimetry, heats of formation, work, Hess’s Law, and endothermic vs exothermic reactions. It also includes practice problems with answers.

These are notes on Hess’s law and standard enthalpy changes and what they entail