A system absorbs 100 cal of heat and does an external work of 150 J. if J=4.2 J/cal the change in internal energy is

Question

A system absorbs 100 cal of heat and does an external work of 150 J. if J=4.2 J/cal the change in internal energy is

A system absorbs 100 cal of heat and does an external work of 150 J. if J=4.2 J/cal the change in internal energy is
A. 420 J
B. 270 J
C. 250 J
D. 150 J

Monjur Alahi

11 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - B
`DeltaQ=100xx4.2`
`=420J`
`DeltaW=150J`
`DeltaU=DeltaQ-DeltaW`
`=420-150=270J`.

11 views Answered 2023-02-05 15:29