Answer :
To answer the question, we need to understand what the chemical equation [tex]\( \text{H}_2\text{O(l)} + \text{heat} \rightarrow \text{H}_2\text{O(g)} \)[/tex] represents. Let's break it down step by step:
1. Understand the states of matter in the equation:
- [tex]\( \text{H}_2\text{O(l)} \)[/tex]: Water in the liquid state.
- [tex]\( \text{H}_2\text{O(g)} \)[/tex]: Water in the gaseous state (steam or water vapor).
2. Identify the process involving heat:
- We see that heat is added in this process. In thermodynamics, adding heat to a substance usually causes a change of state from a lower-energy state to a higher-energy state.
3. Recognize the state change:
- The substance transitions from liquid (l) to gas (g).
4. Match the state change to the correct terminology:
- A. Freezing: Transition from liquid to solid. This involves removing heat.
- B. Condensing: Transition from gas to liquid. This involves removing heat as well.
- C. Melting: Transition from solid to liquid, which involves adding heat. But it does not result in a gas.
- D. Evaporating: Transition from liquid to gas, which involves adding heat.
Given the transition from liquid to gas with the addition of heat, the correct term for this process is evaporating. Therefore, the answer is:
D. Evaporating
1. Understand the states of matter in the equation:
- [tex]\( \text{H}_2\text{O(l)} \)[/tex]: Water in the liquid state.
- [tex]\( \text{H}_2\text{O(g)} \)[/tex]: Water in the gaseous state (steam or water vapor).
2. Identify the process involving heat:
- We see that heat is added in this process. In thermodynamics, adding heat to a substance usually causes a change of state from a lower-energy state to a higher-energy state.
3. Recognize the state change:
- The substance transitions from liquid (l) to gas (g).
4. Match the state change to the correct terminology:
- A. Freezing: Transition from liquid to solid. This involves removing heat.
- B. Condensing: Transition from gas to liquid. This involves removing heat as well.
- C. Melting: Transition from solid to liquid, which involves adding heat. But it does not result in a gas.
- D. Evaporating: Transition from liquid to gas, which involves adding heat.
Given the transition from liquid to gas with the addition of heat, the correct term for this process is evaporating. Therefore, the answer is:
D. Evaporating
