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Energetics 2 Worked examples Ea from graph

Posljednje ažuriranje over 1 year ago

11

Ea from graph

1

1

1

Born Haber Cycles and calculations

3

1

1

3

1

1

1

1

Pitanje 1

1.

null

Gradient = K

Ea = kJmol^-1

Pitanje 2

2.

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(i) = x 10^-3

(ii) =

E_A =

Pitanje 3

3.

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Value 1 = x10^-3

Value 2 =

Gradient =

E_A = kJ mol^-1

Pitanje 4

4.

ionic solid

Drugi mogući odgovor:

Elements in standard states

gaseous ions

Ionic lattice

Pitanje 5

5.

Drugi mogući odgovor:

null

null

(dissociation)

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Pitanje 6

6.

Drugi mogući odgovor:

null

null

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Pitanje 7

7.

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Born Haber cycle = 𝟏/𝟐 E(F–F) + 732 + 289 + +203 = 348 + 955

1/2 bond Enthalpy (F-F) = kJmol^-1

Bond enthalpy = kJmol^-1

Pitanje 8

8.

null

Experimental lattice enthalpy value allows for:

includes interaction ( non–spherical ions / distorted ions / polarisation)

OR AgF has character

Theoretical lattice enthalpy value assumes only interaction

(point charges / no character / perfect spheres )

OR AgF is not perfectly )

Drugi mogući odgovor:

ionic

covalent

Pitanje 9

9.

Comparing lattice enthalpies

null

Chloride ion than fluoride ion

Attraction between Ag⁺ and Cl ^– .

Drugi mogući odgovor:

larger

weaker

Pitanje 10

10.

Enthalpy of hydration calculation

null

Enthalpy change when of a ion forms ions

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null

+77 = +905 – 464 + ∆H(hydration, Cl^– )

Drugi mogući odgovor:

gaseous

–364 (kJ mol^–1 )

1 mol

aqueous

Pitanje 11

11.

null

Mastered