Leader: Sara
Course: Chem177D
Instructor: Bonaccorsi
Supplemental Instruction
Date: 10/7/13
Iowa State University
1) 2 substances of equal mass and temperature are put in a pot of boiling water for
the same amount of time. Their specific heats are .56 J/gK and 1.4 J/gK, which
has a warmer final temperature?
Worksheet 5B:
Calorimetry
2) What heat is required to warm 11.3 g iron (specific heat = .45 J/gK) from 25 C to
317 K?
3) Which statements should be applied to which calorimeter (constant pressure
calorimeter or constant volume calorimeter)?
a. A simple coffee cup calorimeter
b. Bomb calorimeter
c. The calorimeter has its own heat capacity
d. qrxn = -Ccal x ∆T
e. qsol = -qrxn
f. qsol = -msol x Cssol x ∆Tsol
4) you dissolve 7.36 grams of aluminum in 235 mL of water in a constant pressure
calorimeter find qrxn when you the temperature increases 11 C (Cs(Al) = .9
g/molK)
5) in a bomb calorimeter you burn methane and the heat of the reaction is 4.567 kJ
and the temperature inside changes from 300 K to 317 K, what is the heat
capacity of the calorimeter?
6) Find the final temperature of dissolving 5.79 g Barium Hydroxide in 195 g water
when the qrxn = 6.5 kJ and everything starts at 298 K?
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