2. A calorimeter and its contents have a heat capacity of 70 J/°C. A reaction occurs in this calorimeter at atmospheric pressure. The temperature of the system rises 10.5°C when one mole of product is formed. Calculate the heat change for this reaction. 3. If 100 g of a solution (specific heat of 0.32 J/g-°C) undergoes a reaction in which 74.84 J of heat is released, what is the temperature change (AT) of this solution? Does the tem- perature of the solution increase or decrease? 4. 30.0 g of a substance (molar mass: 46 g/mol) required 262 J of heat to raise its temperature from 32.0 to 37.4°C. What is the specific heat per gram and per mole of this substance? (continued on next page) 125

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Chapter6: Thermochemisty
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Problem 6.30QP: Enthalpy a A 100.-g sample of water is placed in an insulated container and allowed to come to room...
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2. A calorimeter and its contents have a heat capacity of 70 J/°C. A reaction occurs in this
calorimeter at atmospheric pressure. The temperature of the system rises 10.5°C when one
mole of product is formed. Calculate the heat change for this reaction.
3. If 100 g of a solution (specific heat of 0.32 J/g-°C) undergoes a reaction in which 74.84 J
of heat is released, what is the temperature change (AT) of this solution? Does the tem-
perature of the solution increase or decrease?
4. 30.0 g of a substance (molar mass: 46 g/mol) required 262 J of heat to raise its temperature
from 32.0 to 37.4°C. What is the specific heat per gram and per mole of this substance?
(continued on next page)
125
Transcribed Image Text:2. A calorimeter and its contents have a heat capacity of 70 J/°C. A reaction occurs in this calorimeter at atmospheric pressure. The temperature of the system rises 10.5°C when one mole of product is formed. Calculate the heat change for this reaction. 3. If 100 g of a solution (specific heat of 0.32 J/g-°C) undergoes a reaction in which 74.84 J of heat is released, what is the temperature change (AT) of this solution? Does the tem- perature of the solution increase or decrease? 4. 30.0 g of a substance (molar mass: 46 g/mol) required 262 J of heat to raise its temperature from 32.0 to 37.4°C. What is the specific heat per gram and per mole of this substance? (continued on next page) 125
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