Molar Specific Heat Homework: Calculating Change in Internal Energy

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SUMMARY

The discussion centers on calculating the change in internal energy and the molar specific heat at constant pressure for an ideal gas. The internal energy change is confirmed to be 19.6 J after adding 25.2 J of heat while the gas expands from 46.0 to 101.2 cm³ at a constant pressure of 1.0 atm. The participants express confusion regarding the calculation of molar specific heat, indicating potential issues with conversions or setup in their approach.

PREREQUISITES
  • Understanding of the first law of thermodynamics
  • Familiarity with ideal gas laws
  • Knowledge of molar specific heat concepts
  • Ability to perform unit conversions in thermodynamic calculations
NEXT STEPS
  • Study the derivation of the first law of thermodynamics
  • Learn about the ideal gas law and its applications
  • Research the formula for calculating molar specific heat at constant pressure
  • Practice unit conversion techniques relevant to thermodynamics
USEFUL FOR

Students in thermodynamics, chemistry enthusiasts, and anyone seeking to understand the principles of heat transfer and gas behavior in ideal conditions.

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Homework Statement



Let 25.2 J of heat be added to a particular ideal gas. As a result, its volume changes from 46.0 to 101.2 cm3 while the pressure remains constant at 1.0 atm. By how much did the internal energy of the gas change?
19.6 J is the answer which i understand how to get the next question is

What is the molar specific heat at constant pressure?
I have tried so many different ways. I don't know if I am doing conversions wrong or not setting it up right. I am pretty sure all my conversions are right.

Homework Equations





The Attempt at a Solution

 
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I feel like there is something missing for the problem. Please help!
 

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