Finding molecular weight from specific heat at constant volume

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SUMMARY

The molecular weight of an unknown solid can be estimated using its specific heat at constant volume (Cv). In this discussion, Cv is given as 319.5 Jkg-1K-1, and the relationship Cv = 3R is applied, where R is the universal gas constant. The calculated mass of the solid is 0.0128 kg. Further steps involve determining the molecular weight using the ideal gas law or related equations.

PREREQUISITES
  • Understanding of specific heat capacity concepts
  • Familiarity with the ideal gas law
  • Knowledge of the universal gas constant (R)
  • Basic skills in unit conversion and dimensional analysis
NEXT STEPS
  • Research the ideal gas law and its applications in calculating molecular weight
  • Learn about the relationship between specific heat and molecular weight
  • Explore methods for calculating molecular weight from mass and moles
  • Investigate the significance of Cv in thermodynamics
USEFUL FOR

Students and professionals in chemistry, physicists, and anyone involved in thermodynamics or material science who needs to estimate molecular weight from specific heat measurements.

TheTourist
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The specific heat at constant volume of an unknown solid is measured at high temperature to be 319.5Jkg-1K-1. Estimate its molecular weight.



Cv=3R




Attempt.
I used the above equation to get a mass of the solid to be 0.0128kg but I have no idea of what to do next!
 
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TheTourist said:
I used the above equation to get a mass of the solid to be 0.0128kg but I have no idea of what to do next!

How did you calculate this? (Please include your units.)
 

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