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Chapter 12: 12.102P (page 497)

When tin is added to copper, the resulting alloy (bronze) is much harder than copper. Explain.

Short Answer

Expert verified

An alloy is formed when two or more metals are mixed in a certain proportion.

Step by step solution

01

Definition

Bronzeis analloy of copper and 12% tin and other elementssuch as aluminium, arsenic, manganese, phosphorus, and silicon.

02

Adding tin with copper  

Avariety of sized atoms make up Alloys.Thismeans the layers of anatom cannot slide over each other easily.

The atoms of elements present in bronze other than copper prevent the layer of copper atoms to slide over each other, thus making bronze metals harder, less malleable, and ductile than copper.

Atoms can easily slide over one another in pure metal.

Alloy 鈥� The presence of other atoms prevents the atoms of metal slide over each other

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Most popular questions from this chapter

Butane is a common fuel used in cigarette lighters and camping stoves. Normally supplied in metal containers under pressure, the fuel exists as a mixture of liquid and gas, so high temperatures may cause the container to explode. At ,25.0oC the vapour pressure of butane is 2.3 atm. What is the pressure in the container at135.0oC vap ( =24.3 kJ/mol)?

Does the strength of the intermolecular forces in a liquid change as the liquid is heated? Explain. Why does liquid viscosity decrease with rising temperature?

Explain the effect of strong intermolecular forces on each of these parameters:

(a) Critical temperature

(b) Boiling point

(c) Vapor pressure

(d) Heat of vaporization

Which member of each pair of compounds forms intermolecular H bonds? Draw the H-bonded structures in each case:

(a) CH32NHor CH33N (b) data-custom-editor="chemistry" HOCH2CH2OH or FCH2CH2F

Bismuth is used to calibrate instruments employed in high-pressure studies because it has several well-characterized crystalline phases. Its phase diagram (right) shows the liquid phase and five solid phases that are stable above 1 katm (1000 atm) and up to 300掳颁 .

(a) Which solid phases are stable at25掳颁?

(b) Which phase is stable at 50 katm and175掳颁?

(c) As the pressure is reduced from 100 to 1 katm at200掳颁, what phase transitions does bismuth undergo?

(d) What phases are present at each of the triple points?
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