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A vat of 6.87 kg of water underwent a decrease in temperature from 61.31 to 58.33...

A vat of 6.87 kg of water underwent a decrease in temperature from 61.31 to 58.33 °C. How much energy in kilojoules left the water? Include the sign in your answer. (For this range of temperature, use a value of 4.18 J·g-1·°C-1for the specific heat of water.)

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