The vapor pressure of dichloromethane, CH2Cl2, at 0 oC is 134 mmHg. The normal boiling point of dichloromethane is 40. oC. Calculate its molar heat of vaporization. Enter your answer numerically, to three significant figures and in terms of kJ/mol.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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