1) In this virtual lab, you will use coffee cup calorimetry to determine the spe

Question

1) In this virtual lab, you will use coffee cup calorimetry to determine the specific heat, c, of a metal.

Imagine that, in lab, you record the mass of a piece of metal, mmetal, as

m(metal) =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.

Tmetal= _____c*

(it start at 23*c and heat up to 80*c)

2)In another step of this lab, you record the mass of water (mwater) in a coffee cup as

m(water)= 130.00 g

What is the initial temperature of the water, Twater1, in the coffee cup as shown to the left?

Twater 1= ____c*

In the next step of the lab (as shown in the animation to the left) you place the hot piece of metal into the cool water. Play the animation and record the final temperature of the water, Twater2.

Twater 2= ____c*

(it start at 20*c and heat up to 24*c)

With the information above and the specific heat of water, 4.184 J/(g C), you calculate the specific heat, c, of the metal.

Explanation / Answer

heat gained by water = mass of water*specific heat of water * temperature difference= 130*4.184*(24-20)=2176 joules

this heat has to be removed from metal in an adiabatic system. heat lost by metal = 45* Cp*(80-23)= 2565 Cp, Cp is the specific heat of metal in J/gm.deg.c

Hence 2565 Cp= 2176

Cp =2176/2565= 0.85 J/gm.deg.c

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