Question

Resultant temperature of a mixture of 20 g ice at O°C and 20 g water at 50°C
A) -10°C
B) 0°C
C) -20°C
D) 25°C
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Answer 1

★Given:

20 g of ice at 0°C and 20g of water at 50°C are mixed.

★To find:

Resultant temperature

★Answer :

The mass of ice and water is same so, the final temperature will be the average of both the temperatures .

Final temperature =

$\frac{0+50}{2}\\ \\ \\ = \frac{\cancel{50}}{\cancel{2}} \\ \\ \\ T _ f = 25^{\circ} C (Option \:D)$

★Additional Information:

$\purple{Thermal \: equilibrium}$ - Thermal equilibrium is the state in which two objects connected by a permeable barrier don't have any heat transfer between them. This happens when the two objects have the same temperature.

*Note - The heat transfer goes on between two substances until they reach equilibria that is they reach the same temperature.