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[Note: No question stem is visible in the provided images. The images contain four statement options related to the effect of temperature on solids.] What happens when a solid is heated?
The kinetic energy of the particles will decrease.
The shape of the solid will remain same.
The kinetic energy of the particles will increase.
No effect of temperature on solids.
The kinetic energy of the particles will increase.
When the temperature of a solid is increased, the kinetic energy of its constituent particles increases. This causes the particles to vibrate more vigorously about their fixed mean positions, leading to thermal expansion and eventually a change in state (melting) if heated sufficiently.
When the temperature of a solid is increased, the kinetic energy of its constituent particles increases. This causes the particles to vibrate more vigorously about their fixed mean positions, leading to thermal expansion and eventually a change in state (melting) if heated sufficiently.
Think of a crowd of people tightly packed in a small room standing still. When the room gets warmer and more energized (temperature increases), people start fidgeting, jumping, and pushing outward against each other, taking up more space.
Heat means Heat = Higher Energy And Temperature (HEAT).
KE=23тАЛkBтАЛT тАФ Average kinetic energy of particles proportional to absolute temperature
╬ФL=L0тАЛ╬▒╬ФT тАФ Linear thermal expansion formula
In a solid, particles (atoms, ions, or molecules) are closely packed together and held by strong intermolecular forces, possessing only vibrational motion. As heat is supplied, temperature rises, which directly translates to an increase in the average kinetic energy of these particles (KE=23тАЛkBтАЛT). Consequently, the particles vibrate with greater amplitude, increasing the average interparticle distance and causing the solid to expand.
Temperature is a measure of the average kinetic energy of the particles.
Increasing temperature increases the amplitude of particle vibrations.
Solids undergo thermal expansion when heated.
Sufficient heating can overcome intermolecular forces leading to melting (solid to liquid).
Helps in understanding states of matter and thermodynamics.
Thermal expansion in bridges, railway tracks, and bimetallic strips.
Melting of ice and metals in industrial processes.
Option A is incorrect because kinetic energy increases, not decreases, with temperature.
Option B is incorrect because solids expand (change volume/shape slightly) when heated.
Option D is incorrect because temperature significantly affects thermal agitation in solids.
C is correct тАФ The kinetic energy of the particles will increase.
Remember that temperature is directly proportional to kinetic energy in all states of matter (solids, liquids, and gases).
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