Home
Class 12
CHEMISTRY
One mole of solid Zn is placed in excess...

One mole of solid Zn is placed in excess of dilute `H_(2)SO_(4)` at `27^(@)C` in a cylinder fitted with a piston . Find the work done for the process of the area of piston is `500 cm^(2)` and it moves out by 50 cm against a pressure of 1 atm during the reaction.
`Zn(s) + 2H^(+)(aq) hArr Zn^(2+) (aq) + H_(2)(g)`

A

`-1.53 kJ`

B

`-2.53 kJ`

C

zero

D

`2.53 KJ`

Text Solution

Verified by Experts

The correct Answer is:
B
`W =-P_("ext")(DeltaV) = -(1 atm) xx 500 xx 50 xx 10^(-3) L = -25 L atm = -25 xx 101.3 xx 10^(-3) kJ = -2.53`kJ
Promotional Banner

Similar Questions

Explore conceptually related problems

A piston whose area is 50 cm^(2) moves through a distance of 30 cm against a pressure of two atmospheres. Calculate the work done in joules.

Why Zn reacts with dilute H_(2)SO_(4) to give H_(2) gas but Cu does not ?

The standard electrode potential for Deniell cell is 1.1V . Calculate the standart Gibbs energy for the reaction. Zn(s) +Cu^(2+)(aq) hArr Zn^(2+)(aq)+Cu(s)

Identify the oxidant and the reductant in the following reactions: a. Zn(s)+(1)/(2)O_(2)(g)rarrZn(s) b. Zn(s)+2H^(o+)(aq)rarrZn^(2-)(aq)+H_(2)(g)

Complete the missing components/variables given as x and y in the following reactions Zn(s) +H_(2)SO_(4)(aq) to ZnSO_(4)(x) +H_(2)(y)