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) =47.00 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 26*c and heat up to 90*c) 2) In another step of this lab, you record the mass of water (mwater) in a coffee cup as m(water)= 118.5 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 24*c and heat up to 27*c) With the information above and the specific heat of water, 4.184 J/(gC), you calculate the specific heat, c, of the metal.

Explanation / Answer

mass of metal piece M = 47 g

temp. of metal piece before heating Ti = 26 * C

temp. of metal piece after heating Th = 90 *C

mass of water Mw = 118.5 g

initial temperature of water Tw = 24 *C

final temperature of water + metal Tf = 27*C

applying energy balance,

heat given by metal piece is taken by water.

Cm = specific heat capacity of metal.

Cw = specific heat capacity of water = 4.18 J/(K-C)

Mm * Cm * (Th - Tf) = Mw * Cw * (Tf - Ti)

Cm * 47.0 * (90 - 27) = 118.5 * 4.184 * (27 - 4)

evaluating this, Cm = 0.5002 J/(K-C)

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