Thermochem QQ Trade

Question 1

What is stored energy called?

Answer 1

POTENTIAL ENERGY

Question 2

The capacity to do work or supply heat is called?

Answer 2

ENERGY

Question 3

What is the energy of motion?

Answer 3

KINETIC ENERGY

Question 4

What is the study of the energy changes that accompany physical or chemical changes in matter?

Answer 4

THERMOCHEMISTRY

Question 5

What is the name of stored energy in which the chemical bonds of molecules act as the “storage” medium

Answer 5

CHEMICAL ENERGY

Question 6

What is the law that says that energy can neither be created or destroyed.

Answer 6

LAW OF CONSERVATION OF ENERGY

Question 7

What is the measure of the average kinetic energy of the particles in a sample of matter?

Answer 7

TEMPERATURE

Question 8

What is the amount of energy transferred between substances called?

Answer 8

HEAT

Question 9

Well-defined part of the universe singled out for study, i.e. reactants is called?

Answer 9

SYSTEM

Question 10

What is the term used for the remainder of the universe. i.e. everything else other than reactant?

Answer 10

SURRONDINGS

Question 11

What is the name of system that energy, but not matter, can be exchanged with the surroundings.

Answer 11

CLOSED SYSTEM

Question 12

Both energy and matter can flow into or out of this system.

Answer 12

OPEN SYSTEM

Question 13

In an __________(ideal system) neither matter nor energy can move in or out.

Answer 13

ISOLATED SYSTEM

Question 14

Type of reaction when heat is transferred from surrounding to system.

Answer 14

ENDOTHERMIC

Question 15

Q>0 for an ______________ process

Answer 15

ENDOTHERMIC

Question 16

When heat is transferred from system to surroundings. Process is called_________?

Answer 16

EXOTHERMIC

Question 17

Q < 0 for an ______________ process

Answer 17

EXOTHERMIC

Question 18

Heat change, ∆H is called_________?

Answer 18

ENTHALPY

Question 19

What type of reaction has the enthalpy written in the equation on the right side?

Answer 19

EXOTHERMIC

Question 20

It is a ____________ reaction when the ∆H is written on the left in the equation?

Answer 20

ENDOTHERMIC

Question 21

On an enthalpy diagram, it is an _______ reaction when the products have a greater energy than the reactants.

Answer 21

ENDOTHERMIC

Question 22

In an exothermic reaction the enthalpy diagram would have the ________ having a greater energy than the ____________

Answer 22

REACTANTS, PRODUCTS

Question 23

What happens to the ∆H when you reverse a reaction?

Answer 23

THE SIGN CHANGES

Question 24

What happens to the value of the ∆H if the number of moles of the reaction is halved?

Answer 24

∆H IS HALVED

Question 25

The __________is the amount of heat required to raise the temperature of the system by 1ºC or 1 K.

Answer 25

HEAT CAPACITY

Question 26

What is the amount of heat required to raise one gram of the substance by 1ºC or 1 K?

Answer 26

SPECIFIC HEAT CAPACITY

Question 27

What is the equation for specific heat capacity, with units?

Answer 27

C= Q/m∆T C= J/ºCg, m = grams, T in ºC

Question 28

Name of equipment that measures the amount of heat transferred during a reaction.

Answer 28

CALORIMETER

Question 29

What equation is used when a calorimeter is used to determine enthalpy of reaction?

Answer 29

Qsol = msol x Cwater x ∆T

Question 30

If the temperature increase that means the solution________ and therefore the reaction is ___________?

Answer 30

ABSORBS HEAT, EXOTHERMIC

Question 31

When the temperature _________ the solution therefore ________ and the reaction is endothermic.

Answer 31

DECREASE, RELEASES HEAT

Question 32

What are the assumptions for doing enthalpy of reaction?

Answer 32

VOLUME OF SOLUTION (mL) = MASS OF SOLUTION, C IS FOR WATER

Question 33

What are the two equations that link Qsol to ∆H?

Answer 33

Qsol= - Qrxn ∆H = Qrxn/ n

Question 34

What is the law that states ∆H is independent of the path taken?

Answer 34

HESS’ LAW

Question 35

What is the amount of energy gained or lost when 1 mole of the substance is formed from its elements under standard conditions?

Answer 35

HEAT OF FORMATION

Question 36

_____________ of a substance is the heat liberated when 1 mole of the substance undergoes complete combustion.

Answer 36

HEAT OF COMBUSTION

Question 37

∆Hfº of an element in its standard state is always __________

Answer 37

ZERO

Question 38

What is the equation for finding heat of reaction using ∆Hf?

Answer 38

∑∆ Hºf(products) - ∑∆Hºf(reactants)