Concepts Of Physics MCQ Edition [Volume 2]
- Exam
- Concepts Of Physics MCQ Edition [Volume 2]
- Subject
- Physics
- Chapter
- Heat and Temperature
Concepts Of Physics MCQ Edition [Volume 2] · Physics · Heat and Temperature
For some time, a solid object is kept in water inside an adiabatic...
For some time, a solid object is kept in water inside an adiabatic container. The temperature of the water decreases during this period, and there is no appreciable change in the shape of the object. The temperature of the solid object
Options
- Amust have increased
- Bmay have remained constant
- Cmust have decreased
- Dmay have increased
Correct answer
D. may have increased
Step-by-step solution
Since the container is adiabatic, no heat is exchanged with the surroundings. The decrease in the temperature of the water indicates that the water loses heat.
This heat must be absorbed by the solid object. The absorbed heat can either increase the temperature of the solid object or be utilized in a phase change.
If the heat increases the thermal energy of the solid, its temperature will increase.
If the solid is at its melting point, it will absorb heat to undergo a phase change, during which its temperature remains constant. The condition that there is no appreciable change in shape allows for a very small amount of melting that does not visibly alter the shape, or a solid-solid phase transition.
Therefore, the temperature of the solid object may have increased or may have remained constant.
This heat must be absorbed by the solid object. The absorbed heat can either increase the temperature of the solid object or be utilized in a phase change.
If the heat increases the thermal energy of the solid, its temperature will increase.
If the solid is at its melting point, it will absorb heat to undergo a phase change, during which its temperature remains constant. The condition that there is no appreciable change in shape allows for a very small amount of melting that does not visibly alter the shape, or a solid-solid phase transition.
Therefore, the temperature of the solid object may have increased or may have remained constant.