OpenStax Chapter 5

Question 1

What is thermochemistry?

Answer 1

the amount of heat absorbed or produced during a reaction

Question 2

Energy

Answer 2

capacity to supply heat or do work

Question 3

work

Answer 3

process of causing matter to move against an opposing force

Question 4

potential energy

Answer 4

the energy an object has because of its position

Question 5

kinetic energy

Answer 5

the energy that an object possesses because of its motion

Question 6

Can energy be converted from one form to another?

Answer 6

yes

Question 7

what is the first law of thermodynamics?

Answer 7

energy cannot be created or destroyed

Question 8

thermal energy

Answer 8

kinetic energy associated with the random motion of atoms and molecules

Question 9

temperature

Answer 9

measure of hot or cold

Question 10

what letter in equations is used for heat? (How is heat represented?)

Answer 10

Q

Question 11

exothermic change

Answer 11

change that releases heat

Question 12

endothermic reaction

Answer 12

reaction that absorbs heat

Question 13

how is energy measured? (HINT - begins with c(

Answer 13

calorie

Question 14

what is something else other than calorie used to measure energy?

Answer 14

joule

Question 15

How do you find heat capacity (C)? ( What is the equation?

Answer 15

C = q/(delta)T

Question 16

what is the specific heat capacity equation?

Answer 16

c = q/m(delta)T

Question 17

what is the specific heat of water?

Answer 17

4.184

Question 18

What is the equation for finding heat when specific heat and mass is known?

Answer 18

q = (specific heat (c))x(Mass (m))x(temperature change (deltaT)

Question 19

what is calorimetry used for?

Answer 19

measuring heat transferred from one substance to another

Question 20

what is a system?

Answer 20

the part undergoing the change

Question 21

the surroundings

Answer 21

everything outside of the reaction

Question 22

calorimeter

Answer 22

used to measure the amount of heat involved in a reaction

Question 23

are the reactants/products or the reaction/solution an inverse relationship?

Answer 23

yes

Question 24

bomb calorimeter

Answer 24

used when yield is high

Question 25

nutritional calorie (C) is equal to?

Answer 25

1000 calories or 1 kcal

Question 26

chemical thermodynamics

Answer 26

relationships between heat work and other energy

Question 27

substances act as reservoirs of what?

Answer 27

energy

Question 28

total of all possible types of energy is called the

Answer 28

internal energy (U)

Question 29

the relationship between internal energy heat and work is represented by the equation

Answer 29

(delta)U = q(heat)+w(work)

Question 30

expansion work

Answer 30

when a system pushes back against the surroundings

Question 31

Enthalpy (H)

Answer 31

descriptor of the thermodynamics of a reaction

Question 32

the equation for enthalpy change is

Answer 32

(delta)H = (change)U(energy)+PV

Question 33

heat of combustion

Answer 33

the change in H when 1 mol is burned

Question 34

hydrocarbon

Answer 34

compound made only of hydrogen and carbon

Question 35

what is an equation for hess law? (the special one with sigma)

Answer 35

deltaH = sigma(n)xdeltaHf(products) - same but with reactants