Physical chemistry 1
The first law of thermodynamics:
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Energy cannot be created or destroyed
U=internal energy
Q = heat
W =work
∆𝑈 = 𝑞 + 𝑤
Internal energy:
-
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The temperature of a system can be
increased if it is heated or if work is
done on the system.
If a gas is adiabatically compressed…
its temperature is increased
Enthalpy:
Are the sum of a thermodynamic system's
internal energy and the product of its pressure
and volume.
𝐻 = 𝑈 + 𝑝𝑣
∆𝐻 = ∆𝑈 + ∆(𝑃𝑉)
∆𝐻 = 𝐶𝑝 (𝑇𝑓 − 𝑇𝑖 )