You visited us 1 times! Enjoying our articles? Unlock Full Access!

1st Law of Thermodynamics

When a system...

Question

When a system is taken from state $i$ to state $f$ along the path $i a f$ , it is found that $Q = 50 c a l$ and $W = 20 c a l$ . Along the path $i b f$ $Q = 36 c a l$ . $W$ along the path $i b f$ is :

6 c a l

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

16 c a l

No worries! We‘ve got your back. Try BYJU‘S free classes today!

66 c a l

No worries! We‘ve got your back. Try BYJU‘S free classes today!

14 c a l

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $6 c a l$
Given :When a system is taken from state $i$ to state $f$ along the path $i a f$ , it is found that $Q = 50 c a l$ and $W = 20 c a l$ . Along the path $i b f$ $Q = 36 c a l$ . W along the path $i b f$ is :

Solution :
We have a formula $Δ Q = Δ U + Δ W$
In process $i a f$
$50 c a l = Δ U + 20 c a l$
$Δ U = 30 c a l$
In process $i b f$
$36 c a l = 20 c a l + Δ W$
$W = 6 c a l$

The Correct Opt = A

Suggest Corrections

Similar questions

Q. When a system is taken from state i to state f along the path iaf, it is found that

Q = 50 c a l

and

W = 20 c a l

. Along the path ibf,

Q = 36 c a l

, W along the path

^{'} i b f^{'}

is :

Q. When a system is taken from a state

i

f

along the path

i a f

(as shown in the figure).

Q = 50 c a l

and

W = 20 c a l

; along path

i b f

Q = 36 c a l

(i) What is

W

along path

i b f

?
(ii) If

W = 13

cal for path

f i

, what is

Q

for the path

f_{i}

?
(iii) Take

E_{i n t, i} = 10 c a l

then what is

E_{i n t, f}

Q. When a system is taken from state

i

to state

f

along the path

i a b f

, it is found that

Q = 50

cal and

W = 20

cal. Along the path

i b f

Q = 36

cal.

W

along the path

i b f

is:

Q. When a system is taken from state

1 t o 2

along the path

1 a 2

it absorbs

50 c a l

of heat and work done is

20 c a l

. Along the path

1 b 2

Q = 36 c a l

. What is the work done along

1 b 2

Q. When a system is taken from state i to a state f along path iaf, Q = 50 J and W = -20 J. Along path fbi, Q = 36 J. If w = 13 J for the return path fi, Q for this path is

Join BYJU'S Learning Program

When a system is taken from state i to state f along the path iaf, it is found that Q=50cal and W=20cal. Along the path ibf Q=36cal. W along the path ibf is :

When a system is taken from state $i$ to state $f$ along the path $i a f$ , it is found that $Q = 50 c a l$ and $W = 20 c a l$ . Along the path $i b f$ $Q = 36 c a l$ . $W$ along the path $i b f$ is :