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130 g of Zn is dissolved in dilute sulph...

130 g of Zn is dissolved in dilute sulphuric acid in an open beaker . Find the work done in the process assuming isothermal operation at 300K.

A

`-1200` cal

B

`-1800` cal

C

`+1800` cal

D

`+1200 ` cal

Text Solution

Verified by Experts

The correct Answer is:
A
Beaker is open and in open beaker external pressure remains constant.
`Zn+ H_(2)SO_(4) rarr ZnSO_(4)+ H_(2)(g)`
`(130)/(65)=2 "mole"`
PV =nRT
`PDeltaV=n_(g)RT`
`W=-n_(g)RT =2xx2xx300=-1200 "cal"`.
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