Chapter 8, Problem 20ICA

A eutectic alloy of two metals contains the specific percentage of each metal that gives the lowest possible melting temperature for any combination of those two metals. Eutectic alloys are often used for soldering electronic components to minimize the possibility of thermal damage. In the past, the most common eutectic alloy used in this application has been 63% Sn, 37% Pb, with a melting temperature of about 361 degrees Fahrenheit [°F], To reduce lead pollution in the environment, many other alloys have been tried, including those in the table below. Complete the following table:

		Eutectic Temperature
	Compound	[°F]	[°C]	[K]	[°R]
(a)	91% Sn, 9% Zn			472
(b)	96.5% Sn, 3.5% Ag				890