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Lab # 9 Specific Heat of Metal

# Lab # 9 Specific Heat of Metal - thermodynamics It states...

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St. John’s University Matthew Li Lab # 11 Locker # 358 Post Lab Question

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1. Given what you know about specific heats of various substances, why are pots and pans made of metal? Pots and Pans are made out of metal because metals have low specific heats, which can cook foods faster. 2. Explain the difference between specific heat and heat capacity. One of the differences is that one of these is an intensive property and the other is an extensive property. Which is why and why? Specific heat is an extensive property and it is the amount of heat required to raise the temperature of 1 gram of a substance by 1 degree Celsius. Heat capacity is an intensive property because it is the quantity of heat needed to raise the temperature of an object by 1 °C. It is intensive because it is independent of sample size. 3. What fundamental scientific law is used in this experiment? How is it used? The fundamental scientific law that’s used in this experiment is the first law of
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Unformatted text preview: thermodynamics. It states that the energy cannot be destroyed nor created or lost. It was used in this experiment when calculating for the heat absorbed by the water and the heat lost by metal, such that both of these values were negative reciprocals. 4. What would be the effect on the specific heat of your metal if one drop (0.05 mL) of water at 100 Celsius remained on your metal? If 0.05 mL of water at 100 C were still on the metal, the specific heat would not have been affected because of the number of significant figures. The fractional uncertainty for the specific heat was 0.005 Jg-1C-1. 0.05 mL of water would have added 14 J to the system, but that value would have been ignored because the heat of the system is rounded down due to one significant figure in temperature change....
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