Pressure/temperature energy question

  • Thread starter Thread starter kavamo
  • Start date Start date
  • Tags Tags
    Energy
Click For Summary

Homework Help Overview

The discussion revolves around a problem involving the calculation of energy required to raise the temperature of hydrogen gas in a cylinder from 0.0° C to 28.0° C, given its volume and pressure. The subject area includes thermodynamics and the ideal gas law.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants explore different equations related to heat transfer and the ideal gas law, questioning the appropriateness of each for the problem at hand. There are attempts to calculate the number of moles of gas and the energy required using various formulas, with some participants expressing confusion about the correct application of specific heat capacities and the ideal gas law.

Discussion Status

The discussion is ongoing, with participants providing guidance on the correct equations to use and clarifying the definitions of variables involved. There is a recognition of the need for proper unit conversions and the significance of using the correct specific heat capacity based on the conditions of the problem.

Contextual Notes

Participants note the importance of converting units appropriately, particularly for volume and temperature, and the need to understand the implications of using specific heat at constant volume versus constant pressure. There is also mention of the molecular weight of hydrogen and its relevance to the calculations.

  • #31
I've recalculated for n and the results are as follows:

n=2.3225 x 10^-1

plug into the equation

Q = (2.3225 x 10^-1)(10.144)(28)
= 65.966432
= 65.97 when rounded

This is the answer! Thank you very much for all your help---You Rock!
 
Last edited:

Similar threads

  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 33 ·
2
Replies
33
Views
3K
Replies
8
Views
2K
  • · Replies 9 ·
Replies
9
Views
950
Replies
5
Views
1K
  • · Replies 9 ·
Replies
9
Views
2K
  • · Replies 5 ·
Replies
5
Views
1K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 27 ·
Replies
27
Views
3K