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Chemistry 30 - Beaverbrook > Thermochemistry > Flashcards

Thermochemistry Flashcards

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1
Q

What is the highest point of the enthalpy graph called?

A

activation complex

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2
Q

define open system

A

when both matter and energy can move in or out

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3
Q

whats the state of water in an open system

A

gas

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4
Q

define a closed system

A

matter stays in the system but energy can be exchanged

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5
Q

what is the state of water in a closed system

A

liquid

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6
Q

define an isolated system

A

when neither matter or energy can move in or out of the system

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7
Q

whats the state of water in an isolated system

A

liquid

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8
Q

what equipment do you use in an open system

A

beaker

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9
Q

what equipment do you use in a closed system

A

sealed flask

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10
Q

what type of equipment do you use in a isolated system

A

calorimeter

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11
Q

what type of system is a calorimeter

A

isolated

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12
Q

law of conservation of energy

A

energy is neither created nor destroyed in any physical or chemical change, it is only converted from one form to another

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13
Q

define heat

A

the thermal energy being transferred between the reaction and its surroundings

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14
Q

define kinetic energy

A

energy related to the motion of a chemical entity

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15
Q

define temperature

A

the average kinetic energy of all the particles in a substance

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16
Q

define thermal energy

A

the total kinetic energy of all the particles in a substance

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17
Q

define potential energy

A

the energy present in the chemical bonds

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18
Q

what does a change in potential energy change

A

bond structure

19
Q

whats enthalpy

A

the total energy of a chemical system

20
Q

what does capital H stand for in the formula and units

A

molar enthalpy in kJ/mol

21
Q

whats the sign associated with an endothermic reaction

A

positive

22
Q

whats the sign associated with an exothermic reaction

A

negative

23
Q

do the products or reactants have more potential energy in an endothermic reaction

A

products have more potential energy

24
Q

do the products or reactants have more potential energy in an exothermic reaction

A

reactants have more potential energy

25
Q

is energy released or absorbed in an endothermic reaction

A

absorbed

26
Q

is energy released or absorbed in a exothermic reaction

A

released

27
Q

what side of the equation is delta H on in an endothermic reaction

A

left

28
Q

what side of the equation is delta H on in an exothermic reaction

A

right

29
Q

whats calorimetry

A

the process of measuring energy changes of an isolated system using a calorimeter

30
Q

whats the specific heat capacity of any solution

A

the same as water

31
Q

whats the formula for a bomb calorimeter

A

capital C delta t

32
Q

what does capital C stand for

A

heat capacity

33
Q

what are the units for heat capacity

A

kJ/degree celsius

34
Q

what type of reaction is cellular respiration

A

exothermic

35
Q

does temperature increase or decrease in an exothermic reaction

A

increase

35
Q

does temperature increase or decrease in an endothermic reaction

A

decrease

35
Q

whats the most important thing to remember with catalysts

A

the delta H is always the same with or without a catalyst

35
Q

what is the state of water in cellular respiration

A

liquid

36
Q

whats the state of water in photosynthesis

A

liquid

37
Q

whats the state of water in hydrocarbon combustion

A

gas

38
Q

what type of system is photosynthesis

A

closed

39
Q

what type of system is cellular respiration

A

closed

40
Q

what type of system is hydrocarbon combustion

A

open

Chemistry 30 - Beaverbrook (1 decks)

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