# Thermodynamics Equations - AP Physics 2

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Converting from celsius to kelvin

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### 15 Terms

1

Converting from celsius to kelvin

K = C + 273.15

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2

The Ideal Gas Law (moles)

PV = nRT

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3

The Ideal Gas Law (molecules)

PV = Nkt (k is Boltzmann’s Constant)

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4

Standard temperature and pressure

273.15K, 1.00atm or 1.013 x 105 N/m2

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5

1 mole of gas at STP in liters

22.4L

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6

NA = 6.02 x 1023 molecules per mole

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7

Boltzmann’s constant

k = 1.38 x 10-23 J/K

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8

Average KE of molecules in gas

KE = (3/2)kT or KE = (1/2)mv2

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9

Internal energy in an ideal monatomic gas

U = (3/2)nRT

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10

The rate of heat flow

(Q/t) = kA(T1 – T2)/l (I is a lowercase L, k is thermal conductivity)

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11

Change in internal energy

ΔU = Q + W

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12

Isothermal process

ΔU = 0, Q = -W

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13

Q = 0, ΔU = W

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14

Isobaric process

ΔU = Q - W

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15

Isochoric process (isovolumetric)

W = 0, ΔU = Q

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