Heat Energy and Fuel Efficiency Quiz

What is the specific heat capacity of water in J/g°C?

• 2.1 J/g°C

• 4.18 J/g°C

• 3.5 J/g°C

• 1.0 J/g°C

In solution calorimetry, what is the purpose of determining the calibration factor?

• To measure the mass of the solution

• To account for heat loss to the surroundings

• To determine the specific heat capacity of the solution

• To calculate the volume of the solution

Which of the following is a common method to analyse temperature-time graphs in solution calorimetry?

• Calculating the slope of the graph

• Measuring the area under the curve

• Identifying the peak temperature

• Determining the initial and final temperatures

How is the efficiency of energy transformation during combustion calculated?

Which macronutrient provides the highest energy value per gram?

• Carbohydrates

• Proteins

• Fats and oils

• Vitamins

What is the typical energy value of carbohydrates in kJ/g?

• 17 kJ/g

• 37 kJ/g

• 29 kJ/g

• 4 kJ/g

In a calorimetry experiment, if the temperature of water increases, what does it indicate about the reaction?

• The reaction is endothermic

• The reaction is exothermic

• The reaction is at equilibrium

• The reaction is non-spontaneous

What is the primary reason for using water in calorimetry experiments?

• It has a low boiling point

• It is a good conductor of electricity

• It has a high specific heat capacity

• It is a strong acid

Which of the following is NOT a factor to consider when calculating energy values of foods?

• Water content

• Macronutrient composition

• Colour of the food

• Cooking method

What is the energy value of proteins in kJ/g?

• 17 kJ/g

• 37 kJ/g

• 29 kJ/g

• 4 kJ/g