Ideal Gas Law and Stoichiometry Using moles and balanced reactions to relate to gas reactions.

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Presentation transcript:

Ideal Gas Law and Stoichiometry Using moles and balanced reactions to relate to gas reactions

Ideal gases and moles We often are concerned with finding the amounts of reactants or products in a reaction and many reaction involve gases. The ideal gas law can be used to find the moles of a chemical in a reaction given P, V, and T. Mole ratios can then be used to apply the information to a chemical reaction and find out more about a reactions chemicals

Ideal gases and moles Example: Auto air bags are inflated by nitrogen gas generated by the rapid decomposition of sodium azide, NaN 3. 2 NaN 3 (s)  2 Na (s) + 3 N 2 (g) If an air bag has a volume of 36 L and is to be filled with nitrogen gas at 1.15 atm and 26.0 ˚C, how many grams of NaN 3 must be decomposed?

Ideal gases and moles Example: 2 C 8 H 18 (l) + 25 O 2 (g)  16 CO 2 (g) + 18 H 2 O(g) If 3035 grams (1 gallon) of gasoline are burned, what volume of carbon dioxide is produced if the pressure is atm, and the temperature is 35.0°C?