Thermochemistry quiz #1 Chapter 6 West Virginia University Dr. Robert Belford

Question 1
 Assuming no heat loss to the environment, calculate the Energy in calories done on a ballon as it expands from 1.0 L to 10.0 L at a constant external pressure of 720 torr. Note; 1 atm-L = 101.3 Joule. (A)  206cal (B)  -206cal (C)  3.58kca (D)  -3.58kcal Hint

Question 2
 Calculate the energy change of a ballon if it is compressed from 2.00L to 0.0200L at a constant external pressure of 1.00 atm and releases 08.5J of heat to the environment. (A)  2.65J (B)  -2.65 (C)  -19.1J (D)  192J Hint

Question 3
 Calculate the energy change of a 30.1 g piece of iron if it is cooled from 400. oC to 25 oC? The specific heat capacity of iron is 0.4513 J/goC. (A)  5.09kJ (B)  -5.09kJ (C)  25.0kJ (D)  -25.0kJ Hint

Question 4
 What would be the final temperature of 100. ml of water at 25 deg C if it absorbed 5.09 kJ of heat. Assume the density of water is constant at 1g/mL. (A)  12 oC (B)  37 oC (C)  13oC (D)  100 oC Hint