A cylinder containing hydrogen gas

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SUMMARY

The discussion focuses on calculating the energy required to raise the temperature of 270 L of hydrogen gas (H2) from 0.0°C to 31°C at a pressure of 10 atm. The ideal gas law (PV = nRT) is applied to determine the mass of hydrogen, yielding 0.12061 kg. The specific heat capacity formula (Q = MCΔT) is used to calculate the energy, but the user encounters issues with the mass calculation, specifically the molecular weight of hydrogen being 2 g/mol, which affects the final energy computation.

PREREQUISITES
  • Understanding of the Ideal Gas Law (PV = nRT)
  • Knowledge of specific heat capacity (Q = MCΔT)
  • Familiarity with the molecular weight of hydrogen (H2 = 2 g/mol)
  • Basic thermodynamics concepts
NEXT STEPS
  • Review the Ideal Gas Law and its applications in thermodynamics
  • Study specific heat capacity calculations for diatomic gases
  • Learn about the conversion between Celsius and Kelvin in thermodynamic equations
  • Explore common mistakes in mass calculations for gases
USEFUL FOR

Students studying thermodynamics, physics enthusiasts, and anyone needing to perform calculations involving gas laws and energy transformations.

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Homework Statement



A cylinder contains 270 L of hydrogen gas (H2 at 0.0 C) and a pressure of 10 atm. How much energy is required to raise the temperature of this gas to 31°C? (answer needs to be kJ)

Homework Equations


PV =nRT
and
Q= MCT



The Attempt at a Solution


PV = nRT==> M= .12061 kg
Q = MC T
(.12061)(.014304) (31) ====> also tried using kelvins instead of celsius for temp...neither has worked
 
Physics news on Phys.org
hydrogen gas is diatomic.
 
sorry, i don't know what that means. Terrible at physics...
 
The MW of H2= 2 gms so your mass is off by a factor of 2 as well.
 

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