Physik 2 Thermodynamik

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23 Terms

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Wirkungsgrad

η=1−∣Q2∣Q1=PQ˙1\eta = 1 - \frac{|Q_2|}{Q_1} = \frac{P}{\dot{Q}_1}

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Leistungszahl ϵ\epsilon

Q/W

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dS(entropie)

=dQT=\frac{dQ}{T}

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nhiệt lượng nhận được QzuQ_{zu}

Q12+Q41

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nhiệt toả ra QabQ_{ab}

Q23+Q34

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WgesW_{ges}

=−(Qab+Qzu)=-\left(Q_{ab}+Q_{zu}\right)

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Q12Q_{12} (isotherme Expansion)

∫V1V2 ⁣p dV=−W12\int_{V1}^{V2}\!p\,dV=-W_{12}

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Q23=U23Q_{23}=U_{23} (adiabatische Expansion)

=mcv(T2−T1)=−Q41=mc_{v}\left(T_2-T_1\right)=-Q_{41}

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f khí đơn nguyên tử

=3

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f khí 2 nguyên tử(O2,N2)

=5

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Carnot-Bedingung für Wärmeströme

Q˙1T1=Q˙2T2\frac{\dot{Q}_1}{T_1} = \frac{\dot{Q}_2}{T_2}

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1.Hauptsatz für Wärmekraftmaschine (Leistung)

Q˙1=P+Q˙2\dot{Q}_1 = P + \dot{Q}_2

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Isobare Wärme Q (p = const)

=nCm,pΔT=mcpΔT=nC_{m,p}\Delta T=mc_{p}\Delta T

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Cm,VC_{m,V}

=cV⋅Mmol=c_{V}\cdot M_{\text{mol}}

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Volumenarbeit allgemein W_12

∫p(V) dV\int p(V)\,dV

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isobarer Zustandsänderung W

p(V2−V1)=pΔVp(V_2-V_1)=p\Delta V

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Spezifische Wärmekapazität cV

c khi V=constV = \text{const} (chỉ thay đổi ΔU\Delta U)

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Spezifische Wärmekapazität cp

c khi p=constp = \text{const} (ΔU+W\Delta U + W)

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Innere Energie dU für ideales Gas

=nCm,VdT=nC_{m,V}dT

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Enthalpie dH für ideales Gas

=nCm,pdT=nC_{m,p}dT

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VmV_m

Vn\frac{V}{n}

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Kritische Punkt

sau đó thì =ideal gas

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Giải lquan đến kalorische Zustandsgleichung

tích phân 2 vế hoặc dT, dV