Chemistry Notes Edexcel 6D

What is the standard enthalpy change of neutralization?

• The standard enthalpy change of neutralization is approximately -100 kJ/mol for weak acids and bases.
• The standard enthalpy change of neutralization is approximately -57 kJ/mol for strong acids and bases.
• The standard enthalpy change of neutralization is 0 kJ/mol.
• The standard enthalpy change of neutralization is around -25 kJ/mol for all reactions.

What is the standard enthalpy change of neutralisation for the reaction of HCl (aq) and NaOH (aq)?

• -57.1 kJ/mol
• -25.0 kJ/mol
• -75.5 kJ/mol
• 0.0 kJ/mol

Which piece of equipment is used to measure the temperature of the solution during the experiment?

• barometer
• thermometer
• pH meter
• spectrophotometer

The standard enthalpy change is measured of neutralisation at ​​ (a)   pressure and ​ (b)   temperature.

• 100 kPa
• 298 K
• 50 kPa, 250 K
• 200 kPa, 350 K
• 75 kPa, 300 K

The reaction of hydrochloric acid (HCl) and sodium hydroxide (NaOH) produces​ (a)   and ​ (b)  

• water
• sodium chloride
• hydrogen gas
• sodium bicarbonate
• sulfuric acid

The formula to calculate the heat energy (Q), Q = m x c x 𝚫T, where m is the ​​ (a)   of the solution while c is the ​ (b)  

• mass
• specific heat capacity
• volume
• thermal conductivity
• density

The standard enthalpy change of neutralisation is the same for all strong acids and strong bases.

• True

• False

The experiment to measure the enthalpy change of neutralisation uses a copper calorimeter. (true/false)

• false
• true

What type of reaction forms water when an acid reacts with an alkali?

(a)  

What is the assumed density of the solution in the experiment?

(a)