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Flashcards in Enthalpy And Entropy Deck (10)
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0

What is Hess' law?

The enthalpy change is the same, irrespective of route taken

1

What is the definition of the enthalpy of formation?

The energy change when one mole of products is made from its constituent elements in their standard state in STP

2

What is STP?

298 K (25°C)
100KPa (1atm)

3

How stable is a compound with a negative -ΔH?

The more negative, the more stable the compound is as it at a lower energy level (therefore has less internal energy)

4

What is entropy?

The freedom possessed by the molecules or atoms within the system

5

What is the symbol and units of entropy?

S
JK^-1mol^-1

6

What is the equation to find how spontaneous a reaction is?

ΔG= ΔH- TΔS

7

What is 0° in Kelivin?

273K

8

If a reaction is spontaneous ΔG must be-

Negative

9

If a reaction is spontaneous, what will ΔG and Kp/Kc be?

ΔG will be negative, Kp and Kc will have large values because the products will predominate