A children brought a balloon which became very small in size the next day. Which is correct statement about balloon?

Options

A. It is isolated system
B. It is an open system
C. It is a closed system
D. It exchanges only energy with the surrounding

Explanation

To solve the question regarding the balloon that became very small in size the next day, we need to analyze the situation step by step:

### Step 1: Understand the Situation
The balloon initially had a certain volume and size, but it became very small the next day. This change in size indicates that something has happened to the gas inside the balloon.

**Hint:** Consider what could cause a balloon to lose volume or size.

### Step 2: Identify the Cause of Size Change
The most likely cause for the balloon becoming smaller is the leakage of gas. Over time, gases can escape through tiny pores or imperfections in the balloon material, leading to a decrease in the amount of gas inside.

**Hint:** Think about how gases behave in a confined space and what happens when they can escape.

### Step 3: Classify the System
Now, we need to classify the balloon as one of the following types of systems:
- Isolated System: No exchange of matter or energy with surroundings.
- Closed System: Exchange of energy but not matter with surroundings.
- Open System: Exchange of both matter and energy with surroundings.

Since the balloon is losing gas (matter) to the surroundings, it cannot be an isolated or closed system. It must be an open system.

**Hint:** Recall the definitions of isolated, closed, and open systems, and determine which one fits the scenario of gas escaping.

### Step 4: Evaluate the Options
Given the options:
1. Isolated system
2. Open system
3. Closed system
4. Exchanges only energy with the surroundings

Based on our analysis, the balloon allows the exchange of gas (matter) with the surroundings, which means it is an open system.

**Hint:** Review the definitions of the systems and see which one allows for the exchange of mass.

### Conclusion
The correct statement about the balloon is that it is an **open system** because it exchanges both matter (the gas inside the balloon) and energy with its surroundings.

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