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?

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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?
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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