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Chemistry Quiz Ch 11 Section 11-1 & 11-2

Chemistry Quiz Ch 11 Section 11-1 & 11-2. Good Luck!. 11-1. Energy. What is the capacity for doing work or supplying heat? What rxn absorbs energy from the surroundings? What is represented by “q”? What is “the amount of heat required to raise 1 gram of a substance by 1 o C?

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Chemistry Quiz Ch 11 Section 11-1 & 11-2

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  1. Chemistry QuizCh 11 Section 11-1 & 11-2 Good Luck!

  2. 11-1 Energy • What is the capacity for doing work or supplying heat? • What rxn absorbs energy from the surroundings? • What is represented by “q”? • What is “the amount of heat required to raise 1 gram of a substance by 1oC? • How much heat is required to raise the temperature of 250g of mercury 52oC? (s.h. of Hg = .14J/gC) Endothermic Heat Specific Heat 1800J or 1.8kJ

  3. 11-2 • What type of rxn has a negative DH value? • Exothermic • What is the heat of rxn for the complete burning of 1 mole of a substance? • Heat of combustion • If heat is moving into the system during a rxn what would the value ( + or - ) of DH be? • Positive + • Calorimetry experiments can be performed at constant volume using a device called a___. • Bomb Calorimeter

  4. Equation • Calculate the specific heat of a substance of the heat supplied is 516J, the mass of the substance is 6.4g, and the temperature changes from 6.78oC to 32.58oC. • 3.1J/goC

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