Posted by **Melissa** on Friday, November 5, 2010 at 7:52pm.

In an experiment 50 g of a metal was heated to 100oC and placed in 200 g of a liquid at 25oC. Which of the following combinations of metal and liquid will produce the largest temperature increase in the liquid? (Assume that there is no energy transfer to the surroundings.)

Choose one answer.

a. Al, C2H5OH

b. Au, H2O

c. Cu, CCl2F2

d. Fe, CCl4

- Chem -
**bobpursley**, Friday, November 5, 2010 at 8:42pm
Lets look at the math.

Sum of heats gained is zero.

50*Cmetal(Tf-100)+200*Cliquid(Tf-25)=0

Tf(50Cmetal+200Cliquid)=200Cliquid*25+5000Cmetal

Tf=(200Cliquid+5000Cmetal)/(50Cmetal+200Cliquid)

multiplying the right side numerator and deoominator by 1/cliquid

Tf=(200+5000cm/cl)/(50cm/cl+200)

let cm/cl be x.

well, it is apparent to me that the cm/cl term in the numerator predominates, so it needs to be maximized .

So the metal with the largest specific heat, and the liquid with the least.

so on the four choices, compute cm/cl . the winner is the highest ratio.

## Answer This Question

## Related Questions

- chemistry - Three metals, iron, copper, and gold, have heat capacities of 0.450 ...
- chemistry - A 50g chunk of metal (c=0.0506 j/g°C) is heated to 60°C. it is then ...
- college chem - In this experiment a hot metal block at 100oC is added to cold ...
- Chemistry - An unknown metal, heated to an unknown temperature until a liquid is...
- chemistry - a 23.8 g sample of unknown metal heated at 100 degrees c is placed ...
- Chemistry - A 50g chuck of metal (c=0.506 j/g degrees celsius) is heated to 60 ...
- Chemistry - A 50g vhuck of metal (c=0.506 j/g degrees celsius) is heated to 60 ...
- CHEM. - Zinc is often used to calibrate calorimeters because it undergoes a ...
- physics - A piece of metal with a mass of 1.9 kg, speciﬁc heat of 200 J/...
- chem - Two metals of equal mass, A and B, both at a temperature of 25 degrees ...

More Related Questions