Thermochemsitry

Question 1

Work

Answer 1

Energy used to cause an object to move

Question 2

Heat

Answer 2

Energy used to increase an objects temperature

Question 3

System

Answer 3

Part of the universe we are looking at

Question 4

Surroundings

Answer 4

Everything else

Question 5

State function

Answer 5

Property of a system that only depends on the systems initial and final state

(Final - initial)

Question 6

Heat (j) joule

Answer 6

Unit of energy 1J=1kg-msquared over s squared

Question 7

Delta t (tfinal - tinitial) is a

Answer 7

State function

Question 8

Q=mcdeltat

If q>0 the reaction is

Answer 8

Endothermic

Question 9

Q=mcdeltat

If q

Answer 9

Exothermic

Question 10

First law of of thermodynamics

Answer 10

Energy is conserved

Question 11

Energy can be ____ or _______

Answer 11

Heat or work

Question 12

Change in energy =

Answer 12

Heat + work

Question 13

Enthalpy (h)

Answer 13

The heat content and flow of a system due to chemical changes

Question 14

The change in enthalpy that accompanies a chemical reaction is known as

Answer 14

Enthalpy of reaction or
Heat of reaction

Delta h rxn

Question 15

Calorimetry is

Answer 15

The measure of heat flow q=mcdeltat

Question 16

Q=mcdeltat

Answer 16

M= mass(grams)
C=specific heat capacity (j/g x degrees Celsius)
Delta t= change in temperature

Question 17

Specific heat capacity

Answer 17

The amount of heat required to raise 1g of substance 1degree c
(J/g degree Celsius)

Question 18

Molar heat capacity

Answer 18

The amount of heat required to raise 1 mol of substance 1 degree celsius (j/mols degree Celsius )

Question 19

Heat capacity

Answer 19

Amount of heat required to raise an amount of substance 1 degree Celsius (j/degree Celsius)

Question 20

Hess’s law (of heat summation)

Answer 20

If a reaction occurs in steps, delta h is equal to the sum of the steps

Question 21

Standard enthalpy of formation of a compound

Answer 21

Enthalpy for the reaction that forms one mile of the compound from its constituent elements

Question 22

Work formula

Answer 22

P * delta v

Question 23

Which reactions are more thermodynamicly favored?

Answer 23

Ectothermic

Question 24

Enthalpy of reaction =

Answer 24

Sum of heat of products-sum of heat of reactants

Question 25

Elements in their standard states have a delta h of formation of

Answer 25

0

Question 26

Energy

Answer 26

Capacity to do work and transfer heat