Week 2 Group Work Problems g (amount) x (heat capacity) xAT q-(amount) x (alH of

Question

Week 2 Group Work Problems g (amount) x (heat capacity) xAT q-(amount) x (alH of phase change) R8.314 molx R.8.314 /mol R-, T, T 1. Indicate if the following properties will increase, decrease, or re A) vapor pressure B) normal boiling point C) surface tension main unafected by an in crease in the strength of the intermolecular forces? ZWhat is the -ofa liquid that has a vapor pressure of 425 torr at 773Cand a boling point of 95.6 C at 1 atm? following substances in order of increasing boiling point (based on your 3. List the understanding of intermolecular forces]: MgO, Ha. SCl, CH OH,CO which will have the higher boiling point based on your knowledge of intermolecular t. Predict forces: a. HBr or NaBr c. CHs or NH d. PC, or S e. CHCls or CF

Explanation / Answer

I'm supposed to answer one last one question at a time. Repost the other questions as separate questions.

Ans 1. A) vapour pressure reduces with increase in intermolecular forces because these forces will bind the molecules together and it will be difficult for the substance to exist in vapour state. So pressure reduces.

B) boiling point increases with increase in intermolecular forces because more heat energy will be required to break the bonds.

C) surface tension increases with increase in intermolecular forces. A molecules in bulk experiences cohesive forces from other molecules in all directions.

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