We have half a bucket ( 6 litre) of water at 20^oC .If we want water at 40^oC , how much steam at 10

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10-1.Thermometry, Thermal Expansion and Calorimetry

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We have half a bucket ($6$ litre) of water at $20^oC $.If we want water at $40^oC$, how much steam at $100^oC$ should be added to it ?

A

$200\ g$

B

$\frac{200}{9}\ g$

C

$2\ kg$

D

$\frac{200}{3}\ g$

Solution

$6000 \times 1 \times(40-20)$

$=\mathrm{m} \times 540+\mathrm{m} \times 1 \times(100-40)$

$12 \times 10^{4}=m \times 600$

$\Rightarrow \mathrm{m}=2 \times 10^{2}=200 \mathrm{gm}$

Standard 11

Physics

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(KVPY-2010)