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CHE 105 > chapter 5/chapter 6 > Flashcards

chapter 5/chapter 6 Flashcards

1
Q

what is the standard atm pressure?

A

1 atm

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2
Q

what are the conversions from atm, torr, mmHg, Pa, psi, inHg

A

1atm=760 mmHg=760torr=101325 Pa=14.7 psi=29.92 inHg

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3
Q

what is thermochemistry?

A

the study of heat changes that accompany chemical reactions

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4
Q

what is internal energy?

A

the sum of heat and work

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5
Q

what is heat?

A

Heat is the transfer of thermal energy between system and surroundings and is a spontaneous process.

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6
Q

whats the specific heat capacity of water?

A

4.18

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7
Q

what is enthalpy?

A

the measure of heat at constant pressure

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8
Q

What does Boyles law state?

A

if volume goes up pressure goes down

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9
Q

What formula goes along with Boyles law?

A

P1V1=P2V2

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10
Q

What does Charles law state?

A

Temperature increases and volume increases

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11
Q

What formula goes along with Charles law?

A

V1/T1=V2/T2

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12
Q

what formula goes along with Avogadros law?

A

V1/n1=V2/n2

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13
Q

what formula goes along with the ideal gas law?

what does R stand for?

A

PV=nRT

.08206 Latm/molK

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14
Q

What is the difference between work and energy?

A

energy- capacity to do work

work-force acting through a distance

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15
Q

What do endothermic reactions do? Positive or negative heat? example?

A

absorbs heating from its surroundings.

+heat

sweat evaporating from skin

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16
Q

what do exothermic reactions do? Positive or negative heat? example?

A

gives off heat to surroundings

-heat

water freezing in the freezer
wood burning in a fire

17
Q

What is Hess’s law?

A

heat evolved or absorbed in a chemical process is the same whether the process takes place in one or in several steps

18
Q

What is the law of thermodynamics?

A

total energy of the universe is constant

energy can be converted from one form to another.

19
Q

what is thermodynamics?

A

the study of energy and its interconversions

20
Q

what is the equation for internal energy?

A

delta E= q+w

CHE 105 (6 decks)

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