In a constant pressure, nonflow process, 6Btus of heat are added to a gas while the volumes change from 1.6ft^3 to 2.0ft^3. If the temperature decreases by 10*F and the system contains 2 lbm of gas, find the pressure in the system. (Cv=.2Btu/lbm*F) 1Btu=778 ft-lbm

Problem:
By adding a heat quantity of 6 BTUs to a non-flowing gas at constant pressure, its volume increases from 1.6 cubic feets to 2 cubic feets and the temperature decreases by 10 degrees Fahrenheit. If mass of gas is 2 lbm and Cv = 0.2 BTU/lb.deg.F, find the pressure. (1 BTU = 778 ft.lb)
Solution:

We will apply the first principle of ...

Solution Summary

The solution provides detailed explanations and step-by-step calculations for finding the pressure in a constant pressure system.

$2.19

See Also This Related BrainMass Solution

Thermodynamic of cyclic process of an ideal gas

An ideal gas described by T(initial)=300K,P(initial)=1 bar and V(i)=10 L is heated at constant volume until P=10 bar.It then undergoes a reversible isothermal expansion until P=1bar.It is then restored to its original state by the extraction of heat at constant pressure. Calculate w for each step.

...Calculate w for each step. ... During an isobaric process, the pressure of the gas remains constant and thus the ... The work done in different processes is calculated. ...

... change Due to this effect of pressure change, the ... and volume of the gas inside the chamber remains constant. ... The change in temperature can be calculated by the ...

Calculating Partial Pressures, Given Equilibrium Constant. ...Calculate the equilibrium partial pressure of all the ... when given the equilibrium constant of the ...

... As calculated above under (b) heat rejected during process 1 - 2 ... d) Determine the heat added during process 2→3 ... For constant pressure heat addition: dQ = cpdT. ...

... A to B, C to D) and two isochoric (B to C, D to A). Complete the following table by calculating U, W ... V 2V V. Process AB (Constant pressure expansion) : Work ...

... in each respective system in order to calculate the entropy ... quantity will be zero for a reversible process. ... gas, liquid or solid) at constant pressure from an ...

... Problem #1 An adiabatic process means that no ... specific cases we can calculate this integral ... we have expansion (or contraction) constant pressure, the pressure...

...process the pressure varies inversely as the volume squared, so that P = 0.2 alpha/V^2. (a) Determine the constant alpha in standard SI units. (b) Calculate...

... dissociation. 2) How to calculate equilibrium partial pressures. ... dissociation. Calculate the equilibrium constant for Kc for the reaction. 2 ...