Unit 9 Vocab

2. energy required to break a covalent bond in a gaseous substance
4. ____ law: if a process can be represented as the sum of several steps, the enthalpy change of the process equals the sum of the enthalpy changes of the steps
6. change heat released or absorbed by a system under constant pressure during a chemical or physical process
9. process of measuring the amount of heat involved in a chemical or physical process
10. unit of energy;
12. extensive property of a body of matter that represents the quantity of heat required to increase its temperature by 1 degree Celsius (or 1 kelvin)
14. process chemical reaction or physical change that releases heat
15. device used to measure the amount of heat absorbed or released in a chemical or physical process
16. sum of a system’s internal energy and the mathematical product of its pressure and volume
17. ____law of thermodynamics:internal energy of a system changes due to heat flow in or out of the system or work done
19. energy of a moving body, in joules, equal to 1/2𝑚𝑣^2 (where m = mass and v = velocity)
20. capacity to supply heat or do work

1. heat released when one mole of a compound undergoes complete combustion under standard conditions
3. total of all possible kinds of energy present in a substance or substances
5. intensive property of a substance that represents the quantity of heat required to raise the temperature of 1 gram of the substance by 1 degree Celsius (or 1 kelvin)
7. energy required to separate one mole of an ionic solid into its component gaseous ions
8. energy of a particle or system of particles derived from relative position, composition, or condition
11. transfer of thermal energy between two bodies
13. energy transfer due to changes in external, macroscopic variables such as pressure and volume; or causing matter to move against an opposing force
18. unit of heat or other energy; the amount of energy required to raise 1 gram of water by 1 degree Celsius