50 POINTS Part D
Calculate the following for test tubes 3 and 4, and record the results in the table:
• the number of moles of zinc used (Use 65.38 grams/mole as the molar mass of zinc.)
• the heat absorbed by the water, in joules (Use Q = mCAT, where 10.0 milliliters of water has a mass of 10.0
grams. Use 4.186 joules/gram degree Celsius as water's specific heat capacity.)
• the change in internal energy of the copper(ii) sulfate (Assume that energy released by the copper(II) sulfate is
absorbed by the water.)
• the reaction enthalpy, in joules/mole
BIŲ x x Font Sizes А А
!!!
5
PER
Test tube 3
Test tube 4
Moles of zinc
Heat absorbed by water (1)
Change in internal energy )
Reaction enthalpy (/mol)
I
Characters used: 132 / 15000