Intro to chemistry

1. Intro to chemistry Therm o A. _______________ is the study of ______ changes that occur during chemical reactions and changes in state. Thermochemistry energy

2. Intro to chemistry Therm o 1. Every substance has a certain amount of ______ inside it. The energy stored in the chemical _____ of a substance is called __________ _______ _____. energy bonds chemical potential energy

3. Intro to chemistry Therm o 2. The law of __________ of _____ states that in any chemical or physical process, _____ is neither created nor destroyed. conservation energy energy

4. Intro to chemistry Therm o B. A major goal of thermochemistry is to examine the flow of ____ energy between a system and its surroundings. heat

5. Intro to chemistry Therm o 1. ____, represented by ___, is energy that transfers from one object to another because of a __________ difference between the objects. Q = mCΔT Heat Q temperature

7. Intro to chemistry Therm o a. Heat flows from a ______ object to a _____ object. warmer cooler

8. Intro to chemistry Therm o b. If two objects remain in contact, heat will flow from the ______ object to the _____ object until the temperature of both is the ____. warmer cooler same

9. Intro to chemistry Therm o 2. Heat is _______ from the surroundings in an __________ process. absorbed endothermic

11. Intro to chemistry Therm o 3. Heat is _______ into the surroundings in an _________ process. released exothermic

13. Intro to chemistry Therm o

14. Intro to chemistry Therm o

15. Intro to chemistry Therm o 4. Heat flow is measured in two common units, the ______ and the ____. calorie Joule

16. Intro to chemistry Therm o a. A _____, _, is defined as the quantity of heat needed to raise the temperature of ___ of pure water ___. calorie c 1g 1°C

17. Intro to chemistry Therm o b. The ____, _, is the quantity of heat that raises the temperature of __ of water _______. Joule J 1g 0.2930°C

18. Intro to chemistry Therm o C. The amount of heat needed to increase the temperature of an object exactly 1°C is the ____ ______ of that object. heat capacity

19. Intro to chemistry Therm o 1. The ____ ______ depends on both its ____ and its _______ composition. heat capacity mass chemical

20. Intro to chemistry Therm o 2. The specific heat capacity, or simply ______ ____, C, of a substance is the amount of heat it takes to raise the temperature of 1g of the substance 1°C. specific heat

23. Intro to chemistry Therm o C = Q= heat (J or cal) m x ΔT mass(g) x change in temp. °C