The Organic Chem Lab Survival Manual: A Student's Guide to Techniques
10th Edition
ISBN: 9781118875780
Author: James W. Zubrick
Publisher: WILEY
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Chapter 12, Problem 3E
Interpretation Introduction
Interpretation:
Rate of heating melting point capillary sample, is to be explained.
Concept Introduction:
➢ The melting point of a substance is the temperature at which it changes state from solid to liquid. This change occurs in atmospheric pressure and during melting point the two phases (solid and liquid) exist in equilibrium.
➢ Usually take melting points in thin, closed-end tubes called capillary tubes, they are also called melting-point tubes or even melting-point capillaries.
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Chapter 12 Solutions
The Organic Chem Lab Survival Manual: A Student's Guide to Techniques
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- What is the evidence that all neutral atoms and molecules exert attractive forces on each other?arrow_forwardGive some related literatures about phase changes and melting pointarrow_forwardWhile water exhibits capillary attraction with capillary tubes, mercury exhibits capill repulsion (see image below). Identify the origin of capillary repulsion in terms of intermolecular forces. Capillary attraction HV Capillary tubes water mercury Capillary repulsionarrow_forward
- Define cohesion and adhesion, and how they can predict capillary action.arrow_forwardChemistry 5. You melt the substance and de-coloration occurs. Unfortunately, you weren’t paying attention and miss the melting point. Should you start over or re-melt it? Or both are options ‘okay’? 6. When measuring the melting point of a substance, it suddenly disappears. What has happened? Can you still measure the melting point? If so, how? 7. We should not re-use a sample in a capillary tube for melting point measurement. Why not? 8. It takes significant amount of time for the melting point apparatus to cool down before next measurement if your new sample has a lower melting point than your previous one. What can you do to reduce this time in between measurements when many samples of different melting points are used?arrow_forwardWhat is the dominant force holding the units together in solid benzoic acid?arrow_forward
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