THERMOCHEMISTRY

Question 1

the study of energy or heat flow that accompanies a chemical reaction and/or physical transformations.

Answer 1

Thermochemistry

Question 2

a branch of thermodynamics that deals with the interconversion of energy between 2 forms:

Answer 2

heat and work

Question 3

Capacity to do work or to produce heat

Answer 3

energy

Question 4

a branch of thermodynamics that deals with the interconversion of energy between 2 forms:

Answer 4

heat and work

Question 5

energy can be converted from one form to another but can be neither created nor destroyed.

Answer 5

law of conservation of energy

Question 6

The total energy content of the universe is constant.

Answer 6

true

Question 7

energy due to position or composition

Answer 7

potential energy

Question 8

involves the transfer of energy between two objects due to a temperature difference.

Answer 8

heat

Question 9

force acting over a distance

Answer 9

work

Question 10

Energy is a state function; work and heat are not State Function

Answer 10

true

Question 11

energy due to motion of the object and depends on the mass of the object and its velocity

Answer 11

kinetic energy

Question 12

property that does not depend in any way on the system’s past or future (only depends on present state).

Answer 12

state function

Question 13

is a form of energy transfer between two objects as a result of their difference in temperature

Answer 13

heat

Question 14

is the part of the universe being studied or to which attention is focused.

Answer 14

system

Question 15

include everything else in the universe.

Answer 15

surroundings

Question 16

part of the universe in which we focus our attention (the reaction)

Answer 16

system

Question 17

anything that is not the system (the beaker, our hands, a solvent, a thermometer, etc.)

Answer 17

surrounding

Question 18

can exchange matter, can exchange heat energy

Answer 18

open system

Question 19

no exchange of matter, can exchange heat energy

Answer 19

closed system

Question 20

can exchange matter, can exchange heat energy

Answer 20

open system

Question 21

no exchange of matter

Answer 21

isolated system

Question 22

Heat flow is into a system.
Absorb energy from the surroundings.

Answer 22

endothermic reaction

Question 23

Energy flows out of the system.

Energy gained by the surroundings must be equal to the energy lost by the system.

Answer 23

exothermic reaction

Question 24

The study of energy and its interconversions

Answer 24

thermodynamics

Question 26

no exchange of matter

Answer 26

isolated system

Question 27

Law of conservation of energy is often called the…

Answer 27

first law of thermodynamics

Question 28

states that heat is a form of energy, and thermodynamic processes are therefore subject to the principle of conservation of energy. This means that heat energy cannot be created nor destroyed

Answer 28

first law of thermodynamics

Question 29

thermodynamic quantities consist of two parts: Number gives the magnitude of the change. Sign indicates the direction of the flow

Answer 29

internal energy

Question 30

E of a system is the sum of the kinetic and potential energies of all the “particles” in the system

Answer 30

internal energy

Question 31

There are two possible types of transformation that a system may undergo:

Answer 31

a. A physical change, i.e a change in physical state that involves release or absorption of energy. b. A chemical change, i.e a chemical reaction that is accompanied by a gain or loss of energy.

Question 32

E of a system is the sum of the kinetic and potential energies of all the “particles” in the system

Answer 32

internal energy

Question 33

Science of measuring heat

Answer 33

calorimetry

Question 34

The energy required to raise the temperature of one gram of a substance by one degree Celsius.

Answer 34

specific heat capacity

Question 35

The energy required to raise the temperature of one mole of substance by one degree Celsius.

Answer 35

molar heat capacity

Question 35

The energy required to raise the temperature of one gram of a substance by one degree Celsius

Answer 35

specific heat capacity

Question 36

If two reactants at the same are mixed and the resulting solution gets warmer, this means the reaction taking place is EXOTHERMIC. An ENDOTHERMIC reaction cools the solution.

Answer 36

true

Question 37

the amount of heat absorbed or released by a chemical reaction at constant atmospheric pressure.

Answer 37

enthalpy

Question 38

This states that the total enthalpy change during the complete course of a chemical reaction is the same whether the reaction is made in one step or in several steps.

Answer 38

hess’s law

Question 39

is a relationship in physical chemistry named after Germain Henri Hess, a Switzerland-born Russian chemist and physician who published it in 1840.

Answer 39

hess’s law of constant heat summation