What mass of silver (in grams) is solidified when 749 joules of heat are released by a sample of molten silver at its freezing p
oint of 962°C? The heat of fusion of silver is 109 J/g. Round your answer to the nearest hundredth.
2 answers:
The correct answer is 6.87 grams Q/Lf=m
heat released Q = 749 joules
heat of fusion of silver L = 109 J/g
Here phase of silver is changing from liquid to solid
so temperature will remain same
all heat will be released due to its phase change
and in this case we use Q=mL
where m is the mass of silver in gram
Q= mL
749 = m * 109
m = 749/109
m = 6.87 gram
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