Arrange the following changes of energy during following phase transition in a proper order. Ice `(0^(@) C) to "water "(50^(@)C) to "ice "(0^(@)C)`
(1) potential energy increases and kinetic energy remains constant
(2) potential energy decreases and kinetic energy remains constant
(3) potential energy increases and kinetic energy increases
(4) potential energy decreases and kinetic energy decreases

Options

A. 4 2 3 1
B. 1 3 2 4
C. 1 3 4 2
D. 3 4 1 2

Explanation

To arrange the changes of energy during the phase transitions from ice at 0°C to water at 50°C and back to ice at 0°C, we can break down the process into distinct steps:

### Step 1: Ice at 0°C to Water at 0°C
- **Process**: When ice at 0°C melts to become water at 0°C, it absorbs heat from the surroundings.
- **Energy Change**: During this phase transition, the potential energy of the system increases as the ice molecules overcome the forces holding them in a solid structure. However, the kinetic energy remains constant because the temperature (and thus the average kinetic energy of the molecules) does not change during the melting process.
- **Conclusion**: This corresponds to **(1) potential energy increases and kinetic energy remains constant**.

### Step 2: Water at 0°C to Water at 50°C
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