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sometimes there are other reactions that happen along the way. For example, let's evaluate the following reaction: Equation 1: CH(g) + H20(g) → CO(g)+ 3H2(g) AH° = ?? Think of this reaction as your “destination" or final reaction, for which we want to figure out the change in enthalpy. We can use two separate reactions each with their own independent changes in enthalpy to calculate the unknown enthalpy for equation 1. Equation 2: CO(g) + H2(g) → C(s) + H2O(g) AH° =-131.3 kJ Equation 3: C(s) + 2H2(g) → CH«(g) AH° = 74.8 kJ Chemical equations can be manipulated and added together in the same way mathematical equations can manipulated to cancel out unwanted variables or to solve for an unknown. 2. If equations 2 and 3 were added together as they are written above (add reactants together and products together), would they give equation 1? Does anything appear on both sides of the equation that could be "canceled out"?

sometimes there are other reactions that happen along the way. For example, let's evaluate the following reaction: Equation 1: CH(g) + H20(g) → CO(g)+ 3H2(g) AH° = ?? Think of this reaction as your “destination" or final reaction, for which we want to figure out the change in enthalpy. We can use two separate reactions each with their own independent changes in enthalpy to calculate the unknown enthalpy for equation 1. Equation 2: CO(g) + H2(g) → C(s) + H2O(g) AH° =-131.3 kJ Equation 3: C(s) + 2H2(g) → CH«(g) AH° = 74.8 kJ Chemical equations can be manipulated and added together in the same way mathematical equations can manipulated to cancel out unwanted variables or to solve for an unknown. 2. If equations 2 and 3 were added together as they are written above (add reactants together and products together), would they give equation 1? Does anything appear on both sides of the equation that could be "canceled out"?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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The same idea can be applied to chemical reactions. Not all reactions go directly from reactants to products, sometimes there are other reactions that happen along the way. For example, let's evaluate the following reaction: Equation 1: CH4(g) + H2O(g) → CO(g) + 3H2(g) AH° = ?? Think of this reaction as your "destination" or final reaction, for which we want to figure out the change in enthalpy. We can use two separate reactions each with their own independent changes in enthalpy to calculate the unknown enthalpy for equation 1. Equation 2: CO(g) + H2(g) → C(s) + H2O(g) AH° =-131.3 kJ Equation 3: C(s) + 2H2(g) → CH4(g) AH° = 74.8 kJ Chemical equations can be manipulated and added together in the same way mathematical equations can manipulated to cancel out unwanted variables or to solve for an unknown. 2. If equations 2 and 3 were added together as they are written above (add reactants together and products together), would they give equation 1? Does anything appear on both sides of the equation that could be "canceled out"?
Transcribed Image Text:The same idea can be applied to chemical reactions. Not all reactions go directly from reactants to products, sometimes there are other reactions that happen along the way. For example, let's evaluate the following reaction: Equation 1: CH4(g) + H2O(g) → CO(g) + 3H2(g) AH° = ?? Think of this reaction as your "destination" or final reaction, for which we want to figure out the change in enthalpy. We can use two separate reactions each with their own independent changes in enthalpy to calculate the unknown enthalpy for equation 1. Equation 2: CO(g) + H2(g) → C(s) + H2O(g) AH° =-131.3 kJ Equation 3: C(s) + 2H2(g) → CH4(g) AH° = 74.8 kJ Chemical equations can be manipulated and added together in the same way mathematical equations can manipulated to cancel out unwanted variables or to solve for an unknown. 2. If equations 2 and 3 were added together as they are written above (add reactants together and products together), would they give equation 1? Does anything appear on both sides of the equation that could be "canceled out"?
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