Change Of State
Bayani Gaba-gaba
Heat a block of ice steadily and something remarkable happens: the temperature rises, pauses, rises again, pauses once more, then climbs a third time. Those pauses mark the moments when the substance is changing state, and understanding why the thermometer stalls is the key to unlocking this entire topic.
This lesson takes you through the particle model of solids, liquids and gases, explains every change of state, introduces specific heat capacity and the equation that links energy to temperature change, and shows you how to read and interpret heating curves. These ideas appear regularly across both Edexcel Papers 1 and 2.
Manufura
- Explain why heating a system will change the energy stored within the system and raise its temperature or produce changes of state
- Describe the changes that occur when a solid melts to form a liquid, and when a liquid evaporates or boils to form a gas
- Describe the arrangement and motion of particles in solids, liquids and gases
- Obtain a temperature-time graph to show the constant temperature during a change of state
- Know that specific heat capacity is the energy required to change the temperature of an object by one degree Celsius per kilogram of mass
- Use the equation: change in thermal energy = mass x specific heat capacity x change in temperature
- Investigate the specific heat capacity of materials including water and some solids
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Katunan tunawa
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Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Change Of State. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which statement correctly describes the particles in a liquid? A) They vibrate about fixed positions B) They are far apart and move randomly C) They are close together and can slide past each other D) They are arranged in a regular pattern Answer: C
- During boiling, the temperature of a pure substance: A) Increases steadily B) Decreases steadily C) Stays constant D) Fluctuates up and down Answer: C
- What is the specific heat capacity of a substance? A) The energy needed to melt 1 kg of the substance B) The energy needed to raise 1 kg by 1 degree Celsius C) The temperature at which the substance changes state D) The energy stored in the bonds of the substance Answer: B
- A flat section on a heating curve indicates that: A) The heater has been switched off B) The substance has reached its maximum temperature C) A change of state is occurring D) The substance is cooling down Answer: C
- Which process is the reverse of melting? A) Boiling B) Evaporation C) Condensation D) Freezing Answer: D
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Phase Change and Latent Heat
Explain changes in heat during changes of state, and describe latent heats of fusion and vaporization
"Physics: Phase Change and Latent Heat" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/11-3-phase-change-and-latent-heat. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Sashen littafi
Temperature Change and Heat Capacity
One of the major effects of heat transfer is temperature change: heating increases the temperature while cooling decreases it. We assume that there is no phase change and that no work is done on or by the system. Experiments show that the transferred heat depends on three factors—the change in tempe
"College Physics: Temperature Change and Heat Capacity" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/college-physics/pages/14-2-temperature-change-and-heat-capacity. Access for free at https://openstax.org/books/college-physics/pages/1-introduction
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Change Of State? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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