As a substance absorbs heat, it may either
Blank
______ or
Blank
______. Choose the 2 answers that fit.

Question

As a substance absorbs heat, it may either 
Blank
______ or 
Blank
______. Choose the 2 answers that fit.

BlackTom AI · Accepted Answer

Heat added to a substance either increases the kinetic energy of its particles (raising temperature) or is consumed to change the arrangement/binding of particles (a phase change) without changing temperature.

1) Relevant concepts
- Sensible heat: Q = m c ΔT. Heat raises temperature proportional to mass m and specific heat c.
- Latent heat (phase change): Q = m L. During melting/boiling, energy breaks intermolecular bonds so temperature remains constant until the phase change completes.
- Conservation of energy: supplied heat either goes into sensible heating or latent heat.

2) Step-by-step reasoning
- If heat Q is absorbed and the substance remains in the same phase, Q increases internal thermal energy and ΔT > 0. Use Q = m c ΔT to find the temperature change.
- If heat is absorbed at a phase boundary (e.g., at 0°C for ice or 100°C for water at 1 atm), the energy goes into changing the phase (solid→liquid or liquid→gas) while temperature stays constant; use Q = m L.
- Therefore, absorbing heat produces either a temperature rise or a phase change depending on conditions.

3) Example calculation (intermediate steps)
- For 0.100 kg of water (c ≈ 4184 J/kg·K), to raise temperature by 1 K: Q = m c ΔT = 0.100 × 4184 × 1 = 418.4 J.
- To melt 0.100 kg ice (L_fusion ≈ 334,000 J/kg): Q = m L = 0.100 × 334,000 = 33,400 J. This shows heat can be used for ΔT or for phase change depending on amount and temperature.

4) Why the correct answers are correct
- "Acquire a higher temperature" corresponds to sensible heating (Q increases temperature).
- "Undergo a phase change" corresponds to latent heat absorption where temperature does not change but phase does.

5) Why the other options are incorrect
- "Acquire a lower temperature": absorbing heat cannot lower temperature; that would require heat loss.
- "Lose energy": absorbing heat increases the system's internal energy (or uses it for phase change); it does not cause net energy loss.

Conclusion: The two correct choices are "undergo a phase change" and "acquire a higher temperature," which matches the provided answer.

As a substance absorbs heat, it may either Blank or Blank . Choose the 2 answers that fit.单项选择题

类似问题

Water freezes at

When water freezes:

Melting ice is an exothermic reaction process.

Which of the following is the only possible situation for a substance?

As heat flows into a substance, its temperature changes according to the graph in the diagram. For what sections of the graph is the substance undergoing a phase change?

Saturated steam is steam that is at the temperature of vaporization

The average potential energy of water molecules is greatest in

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单

As a substance absorbs heat, it may either Blank ______ or Blank ______. Choose the 2 answers that fit.单项选择题