Water has a heat capacity of 4.2 J/gC. This means that to heat up 100 mL of water 1 degree Celsius, we need______.
420 Joules.
540 Joules.
1280 Joules.
2020 Joules.
Detailed Explanation
The heat capacity tells us how much energy is need to raise the temperature of one gram of substance by one degree. Remember, water has a mass of 1g per cubic centimeter (mL), and thus we have 100 grams of water. Thus, \(100g \times 1C \times 4.2J/g \times C = 420\) Joules required.
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