A sample of liquid in a thermally insulated container ( a calorimetre ) is strirred for 2 hr. by a mechancal linkage to motor in the surrounding ,for this procees :
A
`w lt 0, q = 0, Delta U = 0`
B
`w gt 0, q gt 0, Delta U gt 0`
C
`w lt 0, q gt 0, Delta U = 0`
D
`w gt 0, q = 0, Delta U gt 0`
Text Solution
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The correct Answer is:
D
`q=0, " "DeltaU=q+w` `wgt0 " so "DeltaU gt 0`
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