Question

Choose the correct answers from the alternatives given .
Which of the following best describes the second law of thermodynamics?

• A. Energy is neither created nor destroyed, but it can change from one energy form to another
• B. Energy can be created from matter or used to produce mailer
• C. Some useful energy is lost as heat whenever an energy transfer occurs
• D. Energy transfers are always 100% efficient in changing energy from one useful form to another

Answer 1

The correct option is C Some useful energy is lost as heat whenever an energy transfer occurs

The second law of thermodynamics states that whenever energy is transformed, there is a loss of energy through the release of heat. This occurs when energy is transferred between trophic levels as illustrated in a food web. When one animal feeds off another, there is a loss of heat (energy) in the process. Additional loss of energy occurs during respiration and movement. Hence, more and more energy is lost as one moves up through trophic levels.

So, the correct option is 'Some useful energy is lost as heat whenever an energy transfer occurs'.