Choose ALL TRUE statements below 1) Heat of fusion is the amount of energy it ta

Question

Choose ALL TRUE statements below 1) Heat of fusion is the amount of energy it takes to raise the temperature ofig by 1 degree Celsius. 2) Non-polar substances have a higher heat of vaporization than polar substances 3) During changes of state, intermolecular forces are broken 4) During vaporization the temperature remains constant 5) Heat of vapo 6) Specific heat is the amount of energy it takes to change a solid to liquid at the melting temperature rization is the amount of energy it takes to change a liquid to a gas at the boiling temperature.

Explanation / Answer

1. wrong, Heat of fusion is the energy change when a solid substance become liquid at a constant pressure.

2. Polar bonds are weaker(they got little ionic character) than that of non polar bonds. So non polar substance need high temperature to vaporize at its boiling point.

3.The intermolecular arrangement of solid,liquid and gas are different, so during their conversion from one state to another, intermolecular forces will broken. eg: solid to liquid, liquid to gas etc...

4.To start a the process of vaporization, a particular temperature required, but after starts the vaporization:it will not need any more temperature.

5. 5th statement is correct.

6.Specific heat is the amount of heat required to raise the temperature of 1 kg substance by 1 0 C.

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