Given that a substance has a specific heat of 3.77 J/g•°C, what mass (in grams) of it would be required if the release of 245 J of heat energy was desired when it is cooled from 69.6°C to 48.5°C?

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

a electronegativity decreases beacuse the size of nucleus is bigger.

there are two significant figures.