Formative Assessment Experiment 2: Determining the Heat of React

The unit for heat capacity, C is

• J g⁻¹ °C⁻¹

• J g⁻¹

• g J⁻¹

• J g °C

The device used to determine the enthalpy of reaction is

• Thermometer

• Stopwatch

• Calorimeter

The unit for measurement of enthalpy is 

• Gram

• Degree Celcius

• Joule

Why must the same calorimeter be used for both parts of the experiment?

• To ensure the size of calorimeter used in both experiment are equal

• To ensure the amount of heat absorbed by calorimeter in both experiment are equal

• To ensure the mass of calorimeter used in both experiment are equal

Which of the following is not the precaution related to this experiment?

• The mixed solution should be stirred continuously during the experiment

• Acid solution should be poured into the alkaline solution promptly and carefully

• The calorimeter must be closed tightly to reduce heat loss to the surroundings

• The 'X' mark should be observed from the top of the conical flask

'Heat released when 1 mole of gaseous ion is hydrated in aqueous solution at standard conditions'

The definition above refers to the standard enthalpy of

• Solution

• Hydration

• Neutralisation

• Atomisation

If a gold ring with a mass of 5.5 g changes in temperature from 25.0 ⁰C to

28.0 ⁰C, how much energy  has it

absorbed?

(specific heat capacity of gold = 0.129 J g^{-1 o}C^-1) 

• + 2.1 J

• - 2.1 J

• + 21 J

• - 21 J