Unknown Substance: c=0.182772277 cal/g*C

In summary, the specific heat of the substance mentioned is 0.182772277 cal/g * C. It is suggested to refer to a chart of common substances and their specific heats, or use the conversion factor 4.184 Joules/Calorie if the units are different. However, it should be noted that the given value of 0.18 for glass may also apply, as it is considered an approximate input with an accepted level of precision. It is important to display the uncertainty of values and include error analysis in any experimental computations.
  • #1
PrudensOptimus
641
0
c = 0.182772277 cal/g * C

What type of substance is it? it's not glass.
 
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  • #2
Do you have a chart of common substances and their specific heats? If not, I'm sure you could find one on the internet. If the specific heats listed are in different units use the conversion factor 4.184Joules/Calorie.
 
  • #3
Originally posted by eku_girl83
Do you have a chart of common substances and their specific heats? If not, I'm sure you could find one on the internet. If the specific heats listed are in different units use the conversion factor 4.184Joules/Calorie.


My table only has 0.18 for Glass. And I know is not glass.
 
  • #4
actually it probably is given the general acceptance of the idea of approximate input giving apporximate output, which is is used as an excuse by lazy textbook writers to give what they consider to be a "significant" number of digits. Basically except for those of us (like me) who are the most anal about precision .18 and .182772277 are the same.
 
  • #5
A good table of such values will display the uncertianity in the given values. To use digits beyond the given known errors is to introduce garbage in your calculations. If a number is given to 2 or 3 digits, simply assume that the error is .5 of the first unspecified digit.

Any experimentally computed value should include an error analysis of the measurements required to complete the computation.
 

1. What does the value of "c" represent in the unknown substance?

The value of "c" represents the specific heat capacity of the unknown substance, which is the amount of heat required to raise the temperature of one gram of the substance by one degree Celsius.

2. How was the specific heat capacity of the unknown substance determined?

The specific heat capacity of the unknown substance was determined through experimentation and measurement. The substance was heated and the change in temperature and amount of heat absorbed were recorded, allowing for the calculation of the specific heat capacity using the formula c = q/mΔT.

3. Is a specific heat capacity of 0.182772277 cal/g*C considered high or low?

A specific heat capacity of 0.182772277 cal/g*C is considered relatively low. The specific heat capacity of a substance is dependent on its molecular structure and can vary greatly, but on average, values in the range of 0.1-1.0 cal/g*C are common.

4. How does the specific heat capacity of the unknown substance affect its ability to store heat?

The specific heat capacity of a substance directly affects its ability to store heat. A substance with a higher specific heat capacity requires more heat to raise its temperature, meaning it can store more heat energy. In contrast, a substance with a lower specific heat capacity will reach a higher temperature with less heat energy, making it less efficient at storing heat.

5. Can the specific heat capacity of the unknown substance change?

The specific heat capacity of a substance is an intrinsic property and typically does not change. However, certain factors such as phase changes or chemical reactions can alter the specific heat capacity. Additionally, the specific heat capacity may vary slightly depending on the temperature and pressure of the substance.

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