A given mixture at room temperature (20°C) was heated. On a 15 minute duration of being subjected to heat, its temperature steadily increased and stopped changing at 50°C for about 20 minutes. However, the mixture's temperature increased again and eventually stopped at 100°C even after being heated for 30 minutes more as shown in figure 9. Why does the given mixture exhibit two constant temperature readings for a certain amount of time
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The given mixture exhibit two constant temperature readings because of the change of state.
- When a mixture gets heated up, its temperature gradually increases due to the heat energy received by it.
- If there is any transition in the state of the mixture (like solid to liquid or liquid to gas) the temperature remains constant even though heat energy is provided to the mixture.
- The heat supplied during this situation is called the latent heat of fusion or vaporization according to the state being changed.
- The slope of the graph is zero during the transition state.
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