Chemistry F5 C3.2 Heat of precipitation and neutralisation

What is the meaning of heat of neutralisation?

Apakah maksud haba peneutralan?

• The heat absorbed when acid reacts with an alkali

  Haba yang diserap apabila asid bertindak balas dengan alkali

• The heat released when acid reacts with alkali

  Haba yang dibebaskan apabila asid bertindak balas dengan alkali

• The heat change when one mole of water is formed from the reaction between acid and alkali

  Perubahan haba apabila satu mol air terbentuk daripada tindak balas antara asid dengan alkali

• The heat change when one mole of salt is formed from the reaction between acid and alkali

  Perubahan haba apabila satu mol garam terbentuk daripada tindak balas antara asid dengan alkali

Which reaction is endothermic?

Tindak balas manakah adalah endotermik?

• Combustion

  Pembakaran

• Displacement

  Penyesaran

• Neutralisation

  Peneutralan

• Decomposition

  Penguraian

Which pair produces the highest heat of neutralisation?

Pasangan manakah yang menghasilkan haba peneutralan paling tinggi?

• Methanoic acid and sodium hydroxide solution

  Asid metanoik dan larutan natrium hidroksida

• Sulphuric acid and potassium hydroxide solution

  Asid sulfurik dan larutan kalium hidroksida

• Hydrochloric acid and potassium hydroxide solution

  Asid hidroklorik dan larutan kalium hidroksida

• Ethanoic acid and sodium hydroxide solution

  Asid etanoik dan larutan natrium hidroksida

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

What is the definition of heat of precipitation?

Apakah definisi haba peneutralan

• Perubahan haba apabila mendakan yang terbentuk daripada ionnya dalam larutan akeus.

  Heat change when precipitate is formed from their ions in aqueous solution.

• Perubahan haba apabila mendakan yang terbentuk daripada molekulnya dalam larutan akeus.

  Heat change when precipitate is formed from their molecules in aqueous solution.

• Perubahan haba apabila 1 mol mendakan yang terbentuk daripada ionnya dalam larutan akeus.

  Heat change when 1 mole of precipitate is formed from their ions in aqueous solution.

• Perubahan haba apabila 1 mol mendakan yang terbentuk daripada molekulnya dalam larutan akeus.

  Heat change when 1 mole of precipitate is formed from their molecules in aqueous solution.

The heat of neutralisation between sodium hydroxide solution and hydrochloric acid is △H = -57.3 kJ mol^-1

Which of the following energy level diagrams represents the reaction?

Haba peneutralan antara larutan natrium hidroksida dan asid hidroklorik adalah △H = -57.3 kJ mol^-1

Antara rajah aras tenaga berikut, yang manakah mewakili tindak balas tersebut?

• 
• 
• 
• 

Which of the following neutralisation reactions releases the least heat?

Antara berikut tindak balas peneutralan, yang manakah membebaskan haba yang paling kurang?

• 1 mol of HCl (aq) + 1 mol NH₃(aq)

• 1 mol of CH₃COOH (aq) + 1 mol of NH₃(aq)

• 1 mol of CH₃COOH + 1 mol of KOH(aq)

• 1 mol of HCl(aq) + 1 mol of NaOH(aq)

What are the products of the following reaction?

Apakah hasil dalam tindak balas berikut?

H₂SO₄ + KOH -->

• HK + HSO₄

• H₂O + KSO₄

• H₂O + K₂SO₄

• H₂ + K₂SO₄