Question

The temperature of liquid is -5 degree C. The liquid boils at 70 degrees. The temperature of the liquid rises @ 5 degrees/min. After how much time does the liquid start boiling? Please Explain in detail.

Answer 1

Initial temperature = -5°C

Temperature to be attained = 70°C

So, temp. difference = 70 - (-5) = 75°C

Rate = 5°C/min

So, time reqd. = 75/5 = 15°C

Answer 2

Starting(Initial) temperature of liquid = -5ºC

The temperature to be attain for liquid = 70ºC

The temperature difference = 70-(-5) = 75

Rate of Boiling = 5º/min

The liquid starts boiling = 75/5 = 15

So, the answer is 15ºC

I hope it helps....

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