Chapter 5

Question 0

Thermochemistry

Answer 0

The relationships between chemical reactions and energy changes that involve heat

Question 1

Thermodynamics

Answer 1

The study of energy and it’s transformations

Question 2

The capacity to do work or transfer heat.

Answer 2

Energy

Question 3

The energy used to cause an object to move against a force

Answer 3

Work

Question 4

The energy used to cause the temperature of an object to increase

Answer 4

Heat

Question 5

The energy of motion is called _______ energy

Answer 5

Kinetic

Question 6

The magnitude of kinetic energy of an object is given by:

Answer 6

Ek=.5mv^2

V=speed

Question 7

The kinetic energy of an object ______ as its speed increases

Answer 7

Increases

Question 8

Potential energy is

Answer 8

Energy that’s determined by an objects position

Question 9

Gravity is ________ in reactions involving atoms and molecules

Answer 9

Unimportant

Question 10

Eel=

Answer 10

electrostatic energy

Question 11

electrostatic energy equation

Answer 11

Eel=(kQ1*Q2)/d

D=distance
K=proportionality constant
q’s are two objects

Question 12

K constant=

Answer 12

8.99*10^9 J-m/C^2

Question 13

C usually stands for ______

Answer 13

Coulomb

Question 14

1 cal= _____J

Answer 14

4.184

Question 15

Calorie = _____ calorie

Answer 15

1000

Question 16

The portion we single out for study is called ____ everything else is called ______

Answer 16

System

Surroundings

Question 17

An open system

Answer 17

Is a system in which matter and energy can be exchanged with the surroundings

Question 18

Closed systems are more useful for study because ____

Answer 18

They exchange only heat rather than matter as well

Question 19

Work=______

Answer 19

F*d

F= force
d= distance object moves

Question 20

The other way energy is transferred is through ____

Answer 20

Heat

Question 21

First law of thermodynamics

Answer 21

Energy can neither be created nor destroyed.

Question 22

Internal energy is denoted by ___

Answer 22

E

Question 23

Change in interanl energy=

Answer 23

DeltaE= Efinal-Einitial

Question 24

q+w=Delta E

Answer 24

absorb

Question 25

Enthalpy is denoted by

Answer 25

H

Question 26

H=

Answer 26

H=E+PV

Question 27

work equals

Answer 27

-P * Delta V

Question 28

Work can be converted to Joules

Answer 28

1L atm= 101.3

Question 29

Change in enthalpy equals

Answer 29

heat gained or lost at constant pressure

Question 30

Enthalpy is (extensive/intensive)

Answer 30

extentensive

Question 31

You can calculate specific heat with:

Answer 31

(q)/(g)(Temp change)= Specific heat

Question 32

using the same formula you can calculate any other part. Such as q

Answer 32

q=SpecHeatgramstempchange

Question 33

The molar heat capacity is

Answer 33

the heat capacity of one mole of substance

Question 34

To calculate the molar heat capacity, simply convert

Answer 34

specific heat into moles.

H20 (4,18)*(18/1)

Question 35

Hess’s Law

Answer 35

.

Question 36

Hf=

Answer 36

Heat of formation

Question 37

fuel value =

Answer 37

energy produced by one gram of substance