If the door of a refrigerator is kept open, then which of the following is true

Options

A. Room is cooled
B. Room is heated
C. Room is either cooled or heated
D. Room is neither cooled nor heated

Explanation

To solve the question of what happens when the door of a refrigerator is kept open, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding the Function of a Refrigerator**:
- A refrigerator works by removing heat from its interior (the system) and transferring it to the surrounding environment (the room). This process requires work, typically supplied by electricity.

**Hint**: Recall that a refrigerator operates by transferring heat from a cooler area to a warmer area, which is the principle of heat transfer.

2. **Closed Door Scenario**:
- When the refrigerator door is closed, it effectively isolates the inside of the refrigerator from the room. The refrigerator extracts heat from the inside and releases it into the room, keeping the interior cool.

**Hint**: Think about how the refrigerator maintains a low temperature inside when the door is closed.

3. **Open Door Scenario**:
- When the door of the refrigerator is open, the entire room becomes part of the system. The refrigerator now extracts heat from the room and also expels heat into the room.

**Hint**: Visualize how the open door changes the dynamics of heat exchange between the refrigerator and the room.

4. **Heat Transfer Dynamics**:
- The refrigerator extracts heat (let's denote this as ΔH) from the room and, at the same time, it also releases heat into the room. The heat released is greater than the heat extracted because the refrigerator requires work (energy input) to operate.

**Hint**: Remember that the work done by the refrigerator adds additional heat to the room.

5. **Conclusion on Room Temperature**:
- Since the heat released into the room (ΔH + Work done) is greater than the heat extracted from the room (ΔH), the net effect is that the total heat in the room increases. This increase in heat leads to an increase in temperature, meaning the room is heated.

**Hint**: Consider the relationship between heat and temperature; as heat increases, temperature also increases.

### Final Answer:
When the door of a refrigerator is kept open, the room is heated.