Question
In: Chemistry
In the laboratory a"coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the...
In the laboratory a"coffee cup" calorimeter, or constant pressure calorimeter, is frequently used to determine the specific heat of a solid, or to measure the energy of a solution phase reaction. A student heats65.62grams ofzincto98.24 °C and then drops it into a cup containing75.87grams of water at23.87 °C. She measures the final temperature to be29.24 °C. The heat capacity of the calorimeter (sometimes referred to as thecalorimeter constant) was determined in a separate experiment to be1.54J/°C. Assuming that no heat is lost to the surroundings calculate the specific heat ofzinc. what is the Specific Heat (Zn) = ? J/g°C.
Solutions
Expert Solution
Heat lost by hot zinc = heat gained by water + heat gained by calorimeter
Specific heat of Zinc x temp change of zinc x mass of zinc = specific heat of water x temp change x mass of water
+ specific heat of calorimeter x temp change
S x ( 98.24-29.24) x 65.62 = (4.184 x ( 29.24-23.87) x 75.87) + ( 1.54 x ( 29.24-23.87)
S x 4527.78 = 1704.653 + 8.2698
S = 0.3783 J/gC is specifi heat of zinc
queen_honey_blossom answered 2 years agoRelated Solutions
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Part A
In the following experiment, a coffee-cup calorimeter containing
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is 23.0 ∘C. If 4.00 g of CaCl2 is added to the calorimeter, what
will be the final temperature of the solution in the calorimeter?
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Express your answer with the appropriate units.
Hints
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In the following experiment, a coffee-cup calorimeter containing
100 mL of H2O is used. The initial temperature of the calorimeter
is 23.0 ∘C. If 4.90 g of CaCl2 is added to the calorimeter, what
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