May the Force be with You
This intermolecular force is the strongest.
What is hydrogen bonding?
Going from solid to liquid.
What is melting?
Condensation is this kind of process.
What is exothermic?
This is the ranking of CH4, H2O, and CH3Cl from based on strongest to weakest intermolecular strength.
What is H2O, CH3Cl, then CH4?
This is the formula for calculating heat energy absorbed or released by a substance when its temperature changes.
What is q = mcΔT?
This molecule has stronger forces present: I2 or N2.
What is I2?
Going from gas to solid.
What is deposition?
This process requires putting in energy or going “up.”
What is endothermic?
This of the following has the highest boiling point: C2H6, C4H10, C6H14.
What is C6H14?
I want to melt 0.75mol of solid benzene (C6H6) at its melting point (5.5°C). This is the number of kJ of heat required to completely melt the benzene. ΔHfus = 9.87kJ/mol
What is q = 7.40kJ?
CH3CH2OH has these intermolecular forces present.
What is dispersion forces, dipole-dipole, and hydrogen bonding?
Formula for calculating heat energy required by a substance to change its phase.
What is q = nΔH?
True or False: fusion is an exothermic process.
What is false?
CH3COCH3 has these intermolecular forces present.
What are dipole-dipole and dispersion forces?
A 200g sample of liquid water cools from 80°C to 25°C. This is the quantity of heat energy (in J) that is released during the cooling process. Specific heat of water: 4.18 J/g°C
What is –45,980J?
This intermolecular force causes a molecule's boiling point to be higher. (Explain why)
What is hydrogen bonding? Because it is the strongest intermolecular force, more energy is required to break the forces between molecules and create a boil.
This phase change is affected by strong intermolecular forces, causing it to require more energy to change to the following phase.
What are all phase changes?
I am calculating the heat energy for a substance undergoing a temperature change, and my answer is a negative amount of J.
What is exothermic?
This of the following cannot hydrogen bond:
NH2-CO-NH2
CH3-O-CH3
CH3-COOH
H2O
What is CH3-O-CH3?
3.035g of liquid ethanol (C2H5OH) is heated from 25°C to its boiling point at 78.5°C and completely vaporizes at this temperature. Find the total heat energy absorbed by the ethanol during this process (in kJ).
ΔHvap = 38.56 kJ/mol, Specific heat of ethanol: 2.44 J/g°C, molar mass of ethanol: 46.07 g/mol
What is 2.94kJ?