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A piston filled with 0.04 mol of an idea...

A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of `37.0^(@)C.` As it does so, it absorbs 208 J of heat. The values of q and w for the process will be: (R=8.314 J/mol K) (In 7.5=2.01)

A

`q =- 208J, w =+ 208 J`

B

`q = + 208 J, w = + 208 J`

C

`q = + 208J, w =- 208 J`

D

`q =- 208 J, w =- 208 J`

Text Solution

Verified by Experts

The given process is isothermal , hence ` Delta U = 0`
`therefore " " q =- w " " because q = 208 J`
`therefore " " w =- 208 J ` (i.e. work done by the system)
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Thermodynamics deals with energy changes of macroscopic system. a) Consider a chemical reaction taking place in a closed insulated vessel. To which type of thermodynamic system does it belong? b) State the first law of thermodynamics. c) 3 mol of an ideal gas at 1.5 atm and 25^oC expands isothermally in a reversible manner to twice its original volume against an external pressure of 1 atm. Calculate the work done. [R = 8.314 JK^-1mol^-1]

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