Sapung Learnin macmillan learning | Map In this virtual lab, you will use coffee

Question

Sapung Learnin macmillan learning | Map 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, mmetal, as metal 45.00 g 90 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, metal Number Hot Plate Reset Begin In another step of this lab, you record the mass of water (mwater) in a coffee cup as Calorimetry experiment =130.00 g water What is the initial temperature of the water, Twater1, in the coffee cup as shown to the left? 30 Previous Give Up & View Solution Check Answer Next Exit Y Hint

Explanation / Answer

Heat energy lost by metal = heat energy gained by the water

Here coffee cup calorimeter means the initial temprature of water is room temperature = 25 0C

Q metal = - Q H2O

Q H20 = m * s * dT

m = mass of water

s = specific heat capcity

dT = change in temperature

Q H2O = 130 g * 4.184 J/g 0C * (26 - 25)0C

Q H2O = 543.92 J

Q metal = m * s * dT

m = mass of the metal

s = heat capacity of metal

dT = change in temperature

-543.92 = 45 * s (25-89)

s = heat capacity of metal = 0.189 J/g 0C

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