In this experiment you will place a sample of your salt in water in a constant pressure calorimeter.  You will determine the enthalpy change for the dissociation of your salt, Delta Hdiss.   A sample of 4.368 grams of the salt SrCl2 was placed in 35.5 g water, the initial temperature was 20.00℃  and the final temperature was 27.086365℃.   What is the number of moles of SrCl2? 4.368 g SrCl2  x  ( 1 mol SrCl2 / 123.073 g SrCl2 )  =   0.035491131 mol SrCl2   a. 0.035491 mol SrCl2 b. none of these c. 0.035 mol SrCl2 d. 0.03 mol SrCl2 e. 0.0355 mol SrCl2 f. 0.04 mol SrCl2 g. 0.035491131 mol SrCl2 h. 0.03549 mol SrCl2

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Chapter6: Thermochemisty
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Problem 6.151QP: Graphite is burned in oxygen to give carbon monoxide and carbon dioxide. If the product mixture is...
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In this experiment you will place a sample of your salt in water in a constant pressure calorimeter.  You will determine the enthalpy change for the dissociation of your salt, Delta Hdiss.   A sample of 4.368 grams of the salt SrCl2 was placed in 35.5 g water, the initial temperature was 20.00℃  and the final temperature was 27.086365℃.   What is the number of moles of SrCl2?

4.368 g SrCl2  x  ( 1 mol SrCl2 / 123.073 g SrCl2 )  =   0.035491131 mol SrCl2

 
a. 0.035491 mol SrCl2
b. none of these
c. 0.035 mol SrCl2
d. 0.03 mol SrCl2
e. 0.0355 mol SrCl2
f. 0.04 mol SrCl2
g. 0.035491131 mol SrCl2
h. 0.03549 mol SrCl2
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