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learning.com/ibiscms/mod/ibis/view.php?id-2968462 01University of Central Arka 11/8/2016 08.00 AM 173/10010/31/2016 07:50 PrM Gradeboo PrintCalculatorPerjodic Table Question 14 of 34 Map Sapling Learning In this virtual lab, you will use coffee cup calorimetry to determine the specific heat, c, of a metal. Heating the metal Imagine that, in lab, you record the mass of a piece of metal, mnetal, as 30 tal 45.00 g in the next step of the lab (as shown in the animation to the left) you heat up the piece of metal. Play the animation, and record the metal's highest temperature, Tmetal Number OHot Plae In another step of this lab, you record the mass of water (mwater) in a coffee cup as "-"ter = 130.00 What is the initial temperature of the water, Ttert in the coffee cup as shown to the left? OProvous Give Up & View Souton eCheck Answer ONet tl Ext- about us| careers partnersprvacy policy terms of u

Explanation / Answer

1)

Tmetal is about 21 °C

note that it can't be 20 sinc eit is OVER the long line

2)

T = 21 °C also

3)

impossible to get since it require reproduction

Assumfe Tf = 40°C

so..

4)

find C

from... water's heat

Qwater = m*C*Tf

Qwater = 130*4.184*(Tf-21)

for the metal:

Q = m*C*(Tf-Ti)

Qmetal = 45*C*(Tf-21)

then

Qwater = -Qmetal

130*4.184*(Tf-21) = -45*C*(Tf-21)

Note that we shoudl have Tf... add your value

so

C =  130*4.184*(Tf-21) / (-45*(Tf-21))

I will assume Tf = 22°c

C = -130*4.184*(22-21) / (-45*(22-21))

C = 12.087J/gC

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