ER02f Thermochemical Reactions Practice ANSWERS.pdf - SCH4U Energy and Rates of Reaction More Thermochemistry Practice Questions ANSWERS Vocabulary 1 A

ER02f Thermochemical Reactions Practice ANSWERS.pdf - SCH4U...

This preview shows page 1 - 2 out of 3 pages.

SCH4U- Energy and Rates of Reaction More Thermochemistry Practice Questions - ANSWERS Vocabulary 1. A measure of the average kinetic energy of a sample of matter. temperature 2. The amount of energy it takes to raise the temperature of a sample of matter by 1 o C, represented using the symbol C and measured in J/ o C. heat capacity (C = mc) 3. The total energy stored in a sample of matter, consisting of the sum of the kinetic and potential energies. enthalpy 4. A reaction in which the chemical system gains potential energy and the surroundings lose kinetic energy. endothermic 5. The transfer of energy across a boundary (from system to surroundings or vice versa). heat 6. The technique used to experimentally measure the energy absorbed or released by a system in a reaction. calorimetry 7. The law stating that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps. Hess’s Law 8. The process of bond breaking is an _______________________ reaction. endothermic 9. Calculate the amount of energy, in joules and kilojoules, required to increase the temperature of 1 litre (1000 mL) of water by 10 o C. q = 10,000 calories q = 41.8 kJ 10 . The thermochemical quantity formerly known as “heat of reaction”. enthalpy change Thermochemical Equations 1. Calcium oxide reacts with water to produce calcium hydroxide and 65.2 kJ of heat in the following reaction. How much heat is released when 100.0 g of calcium oxide reacts with excess water? CaO(s) + H 2 O(l) Ca(OH) 2 (s) ΔH = - 65.2 kJ 116 kJ 2. The decomposition of baking soda is represented by the following thermochemical equation 2NaHCO 3 (s) + 129 kJ Na 2 CO 3 (s) + H 2 O (l) + CO 2 (g) a) Is this reaction exothermic or endothermic ?
Image of page 1
Image of page 2

You've reached the end of your free preview.

Want to read all 3 pages?

  • Fall '16
  • Maheshwari
  • Chemistry, Hess Law, Thermochem

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors