Energetics and Thermodynamics A2

2

Complete the table.

1

Explain why ΔH4 is greater than ΔH3.

1

What names are given to the enthalpy changes ΔH6 and ΔH7?

2

Suggest the trend in the first electron affinity of the elements in Group 17. Explain your answer.

4

Use the equation and the data given in the table to calculate ΔGo for the reaction at 25 °C.

4

2

Use the data in the table to calculate the standard enthalpy change for reaction 1.

2

Calculate entahlpy change of formation of HCO3-(aq)

1

Calculate standard enthalpy change for reaction 3.

2

Explain your answer.

2

Suggest with reason.

3

Describe and explain the variation in the thermal stabilities of the carbonates of the Group 2
elements.

1

Suggest and explain a reason why sodium carbonate is more stable to heat than magnesium carbonate.

1

Write equation for decomposition.

1

Which one will decompose at lower temperature? Explain your answer.

3

Calculate lattice energy.

1

Complete the table.

Explain why ΔH4 is greater than ΔH3.

What names are given to the enthalpy changes ΔH6 and ΔH7?

Suggest the trend in the first electron affinity of the elements in Group 17. Explain your answer.

Use the equation and the data given in the table to calculate ΔGo for the reaction at 25 °C.

Use the data in the table to calculate the standard enthalpy change for reaction 1.

Calculate entahlpy change of formation of HCO3-(aq)

Calculate standard enthalpy change for reaction 3.

Explain your answer.

Suggest with reason.

Describe and explain the variation in the thermal stabilities of the carbonates of the Group 2 elements.

Suggest and explain a reason why sodium carbonate is more stable to heat than magnesium carbonate.

Write equation for decomposition.

Which one will decompose at lower temperature? Explain your answer.

Calculate lattice energy.

Give reason for your answer.

Describe and explain the variation in the thermal stabilities of the carbonates of the Group 2
elements.