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Chemistry / Chemistry: A Molecular Approach 3 / Chapter 11 / Problem 64E

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

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Explain why the viscosity of multigrade motor oils is less

Chapter 11, Problem 64E

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QUESTION:

Problem 64E

Explain why the viscosity of multigrade motor oils is less temperature-dependent than that of single-grade motor oils.

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QUESTION:

Problem 64E

Explain why the viscosity of multigrade motor oils is less temperature-dependent than that of single-grade motor oils.

ANSWER:

Problem 64 EExplain why the viscosity of multigrade motor oils is less temperature-dependent than thatof single-grade motor oils. Step by step solutionStep 1 of 2Multigrade motor oils contain polymers that coil at low temperatures but unwind at hightemperatures. The polymers coiled and gets compact at low temperatures. They do not contributevery much to the viscosity of the oil because of their compact shape.

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