Question

WATER Table Mas Initial Final Temp Temp Temp. Chang Mas METAL Initial Final emp. Temp Chang Respond to the questions/problems below. Questions/Problems 1. Equal masses of water a Styrofoam cup. The water has a speci has a specific heat of 0.113 cal/g °C lasses of water at 20°C and iron at 40°C are put together in a cup. The water has a specific heat of 1 cal/g °C and the iron specific heat of 0.113 callao What do you think the final temperature will be of both the water and the iron in the sy Show your work. 2. What would happen if you combined equal masses of liquid water at 10°C with ice at O'C? Hint: review the heating curve for water-fig. 12.16 on p. 418 of your text. What do you think the final temperature might be? If you have time carry out this experiment in a Styrofoam cup and explain any differences between your hypothesis and the experimental result.

Answer 1

Answer

Solve by Energy/Heat conservation law.

Heat gain or loss by water = Heat Loss or gain by iron

we know that

   

Q=m.s.AT

where m is mass of body, s is specific heat

and $\Delta T$ is temperature difference.

let final temperature is Tf

Qwater = Qiron

m.s ( Tf - T1) = m.s.(T2 - Tf )

1 x  (Tf - 20) = 0.113 x (40- Tf )

on solving

Tf = 22.03 0C .

Answer 2

this questions also done by same method. but one thing is extra i.e. latent heat of ice. latent heat of ice also adds.

but some data missing for questions one is image and another is latent heat of ice.