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To determine the mass of water that must form to produce 975 kJ of energy, we can use the concept of the heat of vaporization of water, which is approximately 2260 J/g.
First, convert 975 kJ to joules: 975 kJ = 975,000 J.
Then, divide the total energy by the heat of vaporization:
( \text{mass} = \frac{975,000 \text{ J}}{2260 \text{ J/g}} \approx 431.87 \text{ g} ).
Thus, about 432 grams of water must form to produce 975 kJ of energy.
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