250 g of water and equal volume of alcohol of mass 200 g are replaced successively in the same calorimeter and cool from `60^@C` to `55^@C` in 130 s a

Question

250 g of water and equal volume of alcohol of mass 200 g are replaced successively in the same calorimeter and cool from `60^@C` to `55^@C` in 130 s a

250 g of water and equal volume of alcohol of mass 200 g are replaced successively in the same calorimeter and cool from `60^@C` to `55^@C` in 130 s and 67 s, respectively. If the water equivalent of the calorimeter is 10 g, then the specific heat of alcohol in `cal//g^@C` is
A. `1.30`
B. `0.67`
C. `0.62`
D. `0.985`

Monjur Alahi

6 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 - C
Rate of cooling of water = Rate of cooling of alcohol
`implies ((250+10) xx 1xx(5))/(130) = ((200s + 10)xx5)/(67)`
`implies ` Specific heat of alcohol s = `0.62`

6 views Answered 2023-02-05 15:29