Final answer:
No, leaving the refrigerator door open does not cool the kitchen; it actually increases the kitchen's temperature due to the refrigerator's increased work and heat generation.
Therefore the correct answer is option d No, leaving the door open increases the kitchen's temperature
Step-by-step explanation:
Leaving the refrigerator door open does not cool the kitchen. In fact, it results in an increase in the kitchen's temperature. When you leave the refrigerator door open, the compressor works harder to try and maintain the cold temperature inside, but as it is exposed to the warmer room temperature, it cannot keep up. This means the refrigerator continuously uses energy and generates heat in the process, leading to a warmer kitchen.
Referring to thermodynamics, a refrigerator works by absorbing heat from inside the refrigerator (the cold reservoir) and ejecting it to the outside environment (the hot reservoir). When the door is open, the refrigerator tries to cool an infinite space (the kitchen), which it is not designed to do. As a result, the compressor does more work, and consequently, more heat is released into the kitchen. Therefore, the correct answer to the question is (d) No, leaving the door open increases the kitchen's temperature.
The efficiency of a reversible engine cannot be greater than 1.0—this is a fundamental rule dictated by the Second Law of Thermodynamics. Similarly, the coefficient of performance of a reversible refrigerator is always greater than 1.0 because it removes more heat from the cold reservoir than the work input required to move that heat.