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7 Cards in this Set

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Internal energy of a protein

E = U(potential) + U(kinetic)

What must be done to change the energy of a protein?

Delta U = q + w

Where q = heat = C(T(final) - T(initial))

Where C is the heat capacity. Which is the amount of energy required to raise the temperature of a sample by 1 degree Celsius

Define enthalpy of a protein.3

Delta H = delta E + PV

With constant pressure and with no gas, the change in volume (V) = 0

This means that delta H = delta E

Delta E = q + w

Where q = heat = C

Delta H = q

1st law of thermodynamics

Energy cannot be created or destroyed just inter converted between forms

2nd law of thermodynamics

The entropy of the universe is always increasing

3rd law of thermodynamics

The entropy of a system approaches a constant as the temperature of the system approaches absolute zero

Delta H > 0 and Delta H < 0 can be associated with what changes in a protein.

Heat into a protein system changes the molecular interactions

If Delta H > O bond breaking interactions

If Delta H < 0 bond forming interactions