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Across 4. a unit of heat 5. When a rxn absorbs heat 8. the amount of energy release or absorbed as heat at constant pressure 9. the energy released as heat by the complete combustion of a substance at constant pressure/volume 12. When a rxn releases heat 14. energy due to motion 16. the amount of energy (heat) required to evaporate 1 mol of liquid (T&P constant)) 17. the unit used to express energy 18. The study of energy transfer in the form of heat during chemical rxn's and physical changes

Down 1. the amount of energy (heat) required to change 1 mol of solid to liquid (T&P constant) 2. No energy is created nor lost during a rxn 3. A measure of molar movement 4. energy in the chemical bonds of matter 6. the amount of energy release or absorbed as heat in a chemical rxn 7. Energy that can be transferred due to the molar movement 10. stored energy 11. a device used to measure hear absorbed or released in a change 13. the amount of heat needed to raise 1 K 15. the ability to do work