Energy from Fuels and Food (VCE SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is an energy transformation?
What is an energy transformation?
When energy converts from one form to another
What does the first law of thermodynamics state?
What does the first law of thermodynamics state?
Energy cannot be created or destroyed
What is the efficiency of a typical petrol engine?
What is the efficiency of a typical petrol engine?
20%
Which energy converter has the highest efficiency?
Which energy converter has the highest efficiency?
Electric motor at 77%
Which macronutrient provides the most energy per gram?
Which macronutrient provides the most energy per gram?
Fats at 37 kJ/g
Why can humans not digest cellulose?
Why can humans not digest cellulose?
We lack the enzyme cellulase
Which is NOT a reason why food energy is not fully available to the body?
Which is NOT a reason why food energy is not fully available to the body?
Nutrients are too small to absorb
If a device converts 60 J of input energy to 45 J useful energy, what is its efficiency?
If a device converts 60 J of input energy to 45 J useful energy, what is its efficiency?
75%
A food contains 20% carbs, 10% protein, 5% fat. What is its energy value in kJ/g?
A food contains 20% carbs, 10% protein, 5% fat. What is its energy value in kJ/g?
5.3 kJ/g
In a petrol engine, where is the largest single energy loss?
In a petrol engine, where is the largest single energy loss?
Heat through exhaust gases (33 J)