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Byju's Answer

Standard XII

Physics

1st Law of Thermodynamics

In the diagra...

Question

In the diagram shown $Q_{i a f} = 80 c a l$ and $W_{i a f} = 50 c a l$ . If $W = - 30 c a l$ for the curved path $f i$ , value of $Q$ for path $f i$ , will be

60 c a l

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30 c a l

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- 30 c a l

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- 60 c a l

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Solution

The correct option is D $- 60 c a l$
$Q_{i a f} = 80, W_{i a f} = 50, W_{f i} = - 30 c a l$ $Q_{f i} = ?$
Along path $f i$ $Δ U = Q - W$
$= 80 - 50 = 30 c a l$
$Δ U$ for $f i = - 30 c a l$
$Q = W + Δ U = - 30 - 30 = - 60 c a l$ .

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In the diagram shown Qiaf=80 cal and Wiaf=50 cal. If W=−30 cal for the curved path fi, value of Q for path fi, will be

The correct option is D −60 calQiaf=80,Wiaf=50,Wfi=−30cal Qfi=?Along path fi ΔU=Q−W =80−50=30calΔU for fi=−30calQ=W+ΔU=−30−30=−60cal .

In the diagram shown $Q_{i a f} = 80 c a l$ and $W_{i a f} = 50 c a l$ . If $W = - 30 c a l$ for the curved path $f i$ , value of $Q$ for path $f i$ , will be

The correct option is D $- 60 c a l$
$Q_{i a f} = 80, W_{i a f} = 50, W_{f i} = - 30 c a l$ $Q_{f i} = ?$
Along path $f i$ $Δ U = Q - W$
$= 80 - 50 = 30 c a l$
$Δ U$ for $f i = - 30 c a l$
$Q = W + Δ U = - 30 - 30 = - 60 c a l$ .