Question

1 mol of solid Zn is placed in excess of dilute
H SO, at 27°C, in a cylinder fitted with a piston.
The heat given to a surrounding is 36.5 kJ. The
value of AU (in kJ) for the process if the area of
the piston is 500 cm2 of 1 atm during the
reaction:
→ Znan.) + H218)
(aq)
(2) -2.5
(4) – 5
2015)
+ 2H
(1) 2.5
(3) 5​

Answer 1

CHEMISTRY

One mole of solid Zn is placed in excess of dilute H

2

SO

4

at 27

o

C in a cylinder fitted with a piston. Find the value of ΔE, q and w for the process if the area of piston is 500 cm2 and it moves out by 50 cm against a pressure of 1 atm during the reaction. The heat given to surrounding is 36.5 kJ

Zn(s)+2H

+

(aq)⇌Zn

2+

(aq)+H

2

(g)