Fórmulas de Termodinâmica Flashcards

1
Q

Trabalho isobárico

A

W = - Pext . ΔV

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2
Q

Trabalho isotérmico

A

W = - n . R . T . ln (V2/V1)

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3
Q

Capacidade térmica (calorífica)

A

C = Q / ΔT

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4
Q

Variação de entalpia

A

ΔH = ΔU + P.V
ou
ΔH = ΔU + Δn(gás) . R . T

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5
Q

Variação de entropia

A

ΔS = Q / T

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6
Q

Variação de entropia associada à expansão isotérmica reversível

A

ΔS = n . R .T . ln (V2/V1)

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7
Q

Variação de entropia associada a variação de temperatura de um gás monoatômico ideal

A

ΔS = n . C . ln (T2/T1)

OBS: C = 5R / 2

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8
Q

Variação de entropia associada a variação de pressão isotérmica

A

ΔS = n . R . ln (P1/P2)

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9
Q

Variação de entalpia com a temperatura

A

ΔH°(T2) = ΔH°(T1) + (T2 - T1) . ΔCₚ

OBS: ΔCₚ = Σ n . Cₚ(produtos) - Σ n . Cₚ(reagentes)

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10
Q

Variação da energia de Gibbs, com temperatura e pressão constante

A

ΔG = W

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