How many Joules of energy are required to raise the temperature of 200 grams water from 20 degreees celsius to 70 degrees celsius?
2007-06-25 01:53:06 · 4 answers · asked by Gillbates 2 in Science & Mathematics ➔ Chemistry
Since 1 calorie is required to raise the temperature of 1 gram of water by 1 degree Celsius. Then you would require 200 * (70-20) = 10000 calories.
And 1 calorie = 4.184 joules so
You need 41840 joules
2007-06-25 01:58:09 · answer #1 · answered by rscanner 6 · 0⤊ 0⤋
200 g * 4.19 J/g*degC * 50 degC = 41,900 J (to 3 sig figs)
Further precision than 3 sig figs is meaningless. The answer might even should be 1 sig fig in which case it would be 40,000 J.
2007-06-25 09:00:16 · answer #2 · answered by gebobs 6 · 0⤊ 0⤋
the next term in the sequence -8-5-2 could be
2007-06-25 08:58:20 · answer #3 · answered by Tasheba F 1 · 0⤊ 1⤋
Approx. 41.8 KJ is reqired
2007-06-25 09:02:31 · answer #4 · answered by smartnini 2 · 0⤊ 0⤋