M1_5 - Unit 5 How do we predict chemical change? In order...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry XXI Unit 5 How do we predict chemical change? In order to make predictions about the likelihood of a chemical process, we need to explore four main features: THERMODYNAMICS Directionality Extent KINETICS Rate Mechanism The central goal of this unit is to help you identify and apply the different factors that help predict the likelihood of chemical reactions.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemistry XXI Unit 5 How do we predict chemical change? M3. Measuring Rates Analyzing the factors that affect reaction rate. M2. Comparing Free Energies Determining the directionality and extent of chemical reactions. M1. Analyzing Structure Comparing the relative stability of different substances M4. Understanding Mechanism Identifying the steps that determine reaction rates. FOUR MAIN MODULES
Background image of page 2
Chemistry XXI Context To illustrate the power of chemical ideas and models in predicting whether a chemical change will occur or not, we will focus our attention in some of the processes that seem to lie behind the origin of life. Why would the analysis of directionality, extent, rate, and mechanism of chemical reactions be important to understand the EMERGENCE OF LIFE in our planet? Why do we care?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemistry XXI The Problem One of the central questions of modern science is how life started in our planet. The answer to that question depends on our understanding of how we went from simple
Background image of page 4
Chemistry XXI Unit 5 How do we predict chemical change? Module 1: Analyzing Structure Central goal: To evaluate the relative stability of substances based on relevant structural features.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemistry XXI The Challenge Imagine that you have information about the chemical composition of the early Earth. How could you decide what reactions were likely to occur among these “primordial” components? What structural features of the reactants and products could help you make the prediction? How could you qualitatively predict the directionality of a chemical reaction? Transformation How do I change it?
Background image of page 6
Chemistry XXI Relative Stability The extent of the reaction is determined by the relative stability of the reactants and products. Properly evaluating the relative stability of two or more substances is a crucial skill in making predictions about reaction directionality . P o t e n t i a l E n e r g y E a
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chemistry XXI Two Crucial Factors In making judgments about relative stability , we need to consider two types of factors: ENERGETIC FACTORS ENTROPIC FACTORS
Background image of page 8
Chemistry XXI Energetic Factors In general, energetic stability increases with decreasing potential energy of a substance. Let′s think!
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 44

M1_5 - Unit 5 How do we predict chemical change? In order...

This preview shows document pages 1 - 10. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online