First two photos are for the lab \"Heat of Vaporization and Intermolecular force

Question

First two photos are for the lab "Heat of Vaporization and Intermolecular forces."
Last two photos are for the lab "Limiting and Excess Reagents."
Thanks for your time and help.

POST-LAB QUESTIONS Show al work for fll credit 1. Some of sowly Reas dropped very quickly as the solution evaporated and some are of eaporation to the strength of the intermolecular forces. Explai n your reasoning in of recording temperature wersvr process used in cal cess of recording temperature versus time as completed in this experiment is s to the lorimetry. That process can be used to directly calculate the enthalpy of a system. Why couldn't you calculate the enthalpy of this system directly using the data you collected?

Explanation / Answer

1. PbSO4 : 303.26 g/mol

2. mole number = 0.65 mole/lit * 0.04 lit = 0.026 mole

weight = 0.026 mole *303.26 g/mol = 7.88 gm

3. Na2SO4 = 142.04 g/mol

4.mole number =0.35 mole/lit* 0.1 lit = 0.035 mole

weight = 4.97 gm

5. Pb(NO3)2 : 331.2 g/mol

6. mole = 0.4 mole/lit * 1 lit = 0.4 mole

weight = 132.48 gm

7. NaNO3 : 84.9947 g/mol

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