Ap Chem. Ch.5 Flashcards Preview

flashcards! > Ap Chem. Ch.5 > Flashcards

Flashcards in Ap Chem. Ch.5 Deck (32)
Loading flashcards...
0

The study of energy and its transformations

Thermodynamics

1

The study of the relationships between chemical reactions and energy changes involving heat.

Thermochemistry

2

Ability to work or transfer heat.

Energy

3

Energy used to cause and object that has mass to move.

Work

4

Energy used to cause the temperature of an object to rise.

Heat

5

Energy of motion

Kinetic energy

6

Equation for kinetic energy

E = 1/2mv^2
k

7

Energy an object possesses by virtue of its position or chemical composition.

Potential enery

8

Joule actually equals...

1 kg(m^2)/s^2

9

Work equation

F x d

10

The energy transfered from a hotter object to a colder one.
-deals with the motion of objects
-always flows from hot to cold objects

Heat

11

States that energy cannot be created or destroyed.

The first law of thermodynamics

12

The total energy of a system

Internal energy

13

Changes in internal energy can be measured using this equation.

/_\ E= Ef-Ei

14

When a system undergoes a physival or chemical change, the change in internal energy is given by the heat added or liberated from the system plus the work done on or by the system. What is the equation?

/_\E= q +w

15

An endothermic process is one that ________ heat from the surroundings.

Absorbs

16

An exothermi processs is one that ______heat to the surroundings.

Releases

17

Depends only on the initial and final states of a system, not by the path by which the system arrived at that state.

A state function

18

P,V,T,E,H are state fuctions.

Pressure
Volume
Temperature
Internal energy
Heat changes at constant pressure

19

Chemical changes may involve...
-may also involve work done on or by the system

Release of absorption of heat

20

The heat transfered between the system and surroundings during a chemical reaction carried out under constant pressure.

Enthalpy

21

The enthalpy change that accompanies a reation is called...

Enthalpy of reaction

22

Balanced chemical equation that includes states and energy

Thermochemical equation

23

Enthalpy is an ______ property

Extensive

24

The /_\ H of enthalpy is _______proportional to the amount of reactant consumed.

Directly

25

Measurment of heat flow.

Calorimetry

26

Is an apparatus that measures heat flow.

Calorimeter

27

The amount of energy required to raise the temperature of an object by 1 degree celsius.

Heat capacity

28

The heat capacity of 1 g of a substance.

Specific heat

29

Equation for heat capacity

q=m x c x /_\T