worksheet 12

# worksheet 12 - Fall 2010 CH301 Worksheet 12-Thermodynamics...

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Fall 2010 CH301 Worksheet 1 2 --Thermodynamics 1. A small (74 g) serving of French fries is burned in a bomb calorimeter containing 3 L of water. The temperature of the water increases by 82°C. The calorimeter has a heat capacity of 200 J/°C, the density of water is 1 g/mL, and the heat capacity of water is 4.18 J/g°C. How much heat is evolved per gram of french fries? 2. The same calorimeter as in number 1 is used to measure the enthalpy of dissolving 2.5 mol of potassium chloride (KCl) in water. If the enthalpy of the process is H = +15 kJ/mol and the initial temperature of the water is 298 K, what is the final temperature of the water? 3. Given C 2 H 2 + 5/2 O 2 2 CO 2 + H 2 O H = -1300 kJ/mol C 2 H 2 + H 2 C 2 H 4 H = -175 kJ/mol C 2 H 4 + H 2 O CH 3 CH 2 OH H = -44 kJ/mol H 2 + ½ O 2 H 2 O H = -286 kJ/mol Find H for the combustion of ethanol, CH 3 CH 2 OH + 3 O 2 2 CO 2 + 3 H 2 O 4. Given the following information, calculate the enthalpy change for the reaction

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worksheet 12 - Fall 2010 CH301 Worksheet 12-Thermodynamics...

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