4. How much heat, in kJ, does it take to heat 10.0 g of ice from -24.0°C to 75.0°C? 5. Calculate the amount of heat, in kilojoules, required to convert 180 grams of water at 10.0°C to steam at 105.0 °C. How much heat would be released in the reverse process?
4. How much heat, in kJ, does it take to heat 10.0 g of ice from -24.0°C to 75.0°C? 5. Calculate the amount of heat, in kilojoules, required to convert 180 grams of water at 10.0°C to steam at 105.0 °C. How much heat would be released in the reverse process?
Introductory Chemistry: A Foundation
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Author:Steven S. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Donald J. DeCoste
Chapter15: Solutions
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Problem 17CR: Are changes in state physical or chemical changes? Explain. What type of forces must be overcome to...
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Transcribed Image Text:4. How much heat, in kJ, does it take to heat 10.0 g of ice from -24.0°C to 75.0°C?
5. Calculate the amount of heat, in kilojoules, required to convert 180 grams of water at 10.0°C to
steam at 105.0 °C. How much heat would be released in the reverse process?
Expert Solution

Step 1
The specific heat of water is 4.184 J/g °C. It is related with heat absorbed or evolved by system as -
Q = m c ∆T
Here,
Q = Heat evolved or absorbed by the system in Joules or kilojoule
m = mass of substance in gram or kilogram
c = specific heat of the substance in J/g °C or kJ/kg °C
∆T = change in temperature = T2 - T1 (T2 is final temperature and T1 is initial temperature of the system)
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