procedure to determine latent heat fo fusion of ice

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Asked 2/28/2009 8:49:36 AM

Updated 55 days ago|10/17/2024 12:33:09 AM

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User: procedure to determine latent heat fo fusion of ice

Weegy: Specific Heat of Antifreeze The specific heat of a substance, at any temperature, is the amount of heat needed to change the temperature of 1g of a substance by 1C. [ Therefore, when a substance with mass m undergoes a temperature change of ?T, the total amount of heat it absorbed or released in this process is Q = mc ?T Equation 1. Where: Q = the amount of heat c = the specific heat of the substance In this experiment the specific heat of antifreeze will be determined by the “classical method of mixtures”. Hot water is mixed with cold antifreeze in a Styrofoam cup. The cup may be assumed to be of negligible heat capacity. In effect it may be treated as if it were “not there”, apart from its insulating properties. The equation describing the heat exchanges involved is: Heat lost by water = Heat gained by antifreeze m1c1(T1– Teq) = m2c2(Teq- T2) Equation 2. Where subscript 1 is used for water and subscript 2 for antifreeze. Procedure1. Measure the mass of the cup on the triple beam balance. Just under half fill the cup with antifreeze and then measure the combined mass of the cup and antifreeze. From this information calculate the mass of the antifreeze. 2. Boil some water in a beaker and when it is boiling note at what temperature it boils. 3. Note what the initial temperature of the antifreeze is then quickly, but carefully, pour boiling water into the antifreeze in the cup, until it is almost full. Put the lid on the cup and then gently stir the mixture. Measure the mixture’s equilibrium temperature, once this has been reached. 4. Remove the lid and then measure the new combined mass of the cup and its contents, to find the mass of boiling water added. 5. Use your data and Equation 2 to find the specific heat of the antifreeze. The specific heat of water is 4.18J/gºC. 6. Antifreeze is mostly ethylene glycol. The specific heat of ethylene glycol is 2.39J/gºC 7. Did it seem reasonable to you to “ignore” the cup?8. Discuss the most significant factors that might have affected the results of your experiment. ]
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Asked 2/28/2009 8:49:36 AM

Updated 55 days ago|10/17/2024 12:33:09 AM

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Cliff:

The procedure to determine the latent heat of fusion of ice involves measuring the mass of ice, adding it to a known quantity of warm water, recording the temperature change, and applying the formula ( Q = mx L_f ) to calculate the latent heat, where ( Q ) is the heat absorbed, ( m) is the mass of the ice, and ( L_f ) is the latent heat of fusion.

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