The statements below were made by some students describing what happened during the determination of the melting point of solids.
i. the temperature of the solid was solid until melting started
ii. the temperature of the solid rose until melting started
iii. during melting, the temperature was rising
iv. during melting, the temperature was constant
v. the temperature continued to rise after all the solid had melted
vi. the temperature stopped rising after all the solid had melted. Which of the following gives correct statements in the right order?
ii, iv, and v
ii, iii and vi
i, iii and vi
i, iii and v
i, iv and v
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Discussions (13)
for a solid to change to a liquid, it undergoes fusion. and they following are what happens during the melting.
1. when the solid is heated the temperature increases so as to disassociate the bonds but once it start melting the temperature doesn't rise again but it is constant. so after the solid have melted the temperature rises again to allow the melted solid reach it boiling point
Temperature increases before melting as a result of heating. During melting, temperature does not increase because the heat energy is used in breaking solid bonds to become liquid, once this is done, rise in temperature continues after boiling.
The correct answer is:
A. ii, iv, and v
Explanation:
When determining the melting point of a solid, the temperature changes follow a predictable pattern:
The temperature of the solid rises until melting starts.
As heat is applied, the temperature of the solid increases until it reaches its melting point.
(Statement ii - TRUE)
During melting, the temperature remains constant.
Once melting begins, the heat energy supplied is used to break the bonds between particles rather than increasing temperature.
This means the temperature remains constant during the entire melting process.
(Statement iv - TRUE)
The temperature continues to rise after all the solid has melted.
After the solid has completely melted, any further heating causes the temperature of the liquid to increase again.
(Statement v - TRUE)
The correct answer is A. ii, iv, and v.
Here's why:
*Step 1: Initial Heating*
The temperature of the solid rises until melting starts (statement ii). This is because the solid is absorbing heat energy from the surroundings.
*Step 2: Melting Point*
During melting, the temperature remains constant (statement iv). This is because the heat energy being absorbed is used to change the state of the solid (from solid to liquid) rather than increasing the temperature.
*Step 3: Continued Heating*
After all the solid has melted, the temperature continues to rise (statement v). This is because the heat energy is now being used to increase the temperature of the liquid.
The other options do not accurately describe the correct sequence of events during the determination of the melting point of solids.
its temperature rises to reach the melting point .then the rest of the heat is aborb by the solid inform of latent heat to melt. so it will be constant because the heat now breaking the bonds after breaking the bond it will continue to rise again
Option E is correct
The temperature of the soild remains constant until melting starts.
This is while the ice at 0 degrees will first change to water at 0 degrees before there would be a further increase in temperature.
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