26Mar/10Off
Scale Water
How many degrees are between the melting pot of ice and the boiling point of water on the Kelvin scale?
2. Calculate the energy in joules released by 20 grams of 100 degrees Celsius steam that condenses and then cools to 0 degrees Celsius?
3. How many joules are needed to raise the temperature of 1 gram of water by 1 degrees Celsius?
1) the number of degrees are 100
2) heat energy released = 20 x 540 + 20 x100 = 12800 calories = 12800 x4.2 J = 53760 J
3) energy needed Q = m c (t2-t1) = 1 x 1 x 1 = 1 calorie = 4.2 J
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