(b) We are all aware of the importance of oxygen gas to all life forms, especially human beings. It is one gas that supports all life forms. There is another gas, which we call as hydrogen that is equally important for us. The freezing point of oxygen is – 218.79°C and hydrogen is – 252.8°C. A scientific lab is lowering the temperatulre inside a fridge. (i) Which freezes first? (ii) How much colder does it have to be for both to freeze?
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Newton's law of cooling states that the rate of heat loss of a body is directly proportional to the difference in the temperatures between the body and its surroundings.
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