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Standard XII

Physics

Specific Heat Capacity

In an experim...

Question

In an experiment a sphere of aluminium of mass $0.20 k g$ is heated upto $150^{o} C$ . Immediately, it is put into water of volume $150 c c$ at $27^{o} C$ kept in a calorimeter of water equivalent of $0.025 k g$ . Final temperature of the system is $40^{o} C$ . The specific heat of aluminium is :
(take $4.2$ Joule $= 1$ calorie)

434 J / k g -^{o} C

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378 J / k g -^{o} C

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476 J / k g -^{o} C

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315 J / k g -^{o} C

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Solution

The correct option is A $434 J / k g -^{o} C$
Heat lost by metal Blodg $=$ Heat gain by $H_{2} O +$ contain
$\Rightarrow m_{1} C_{1} Δ T_{1} = (m_{2} + w) C_{2} Δ T_{2}$
$\Rightarrow 0.20 \times C_{1} \times (150 - 40) = (150 \times 10^{- 3})$
$C_{1} = 434 y k g^{- 1} k^{- 1}$

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In an experiment a sphere of aluminium of mass 0.20kg is heated upto 150oC. Immediately, it is put into water of volume 150cc at 27oC kept in a calorimeter of water equivalent of 0.025kg. Final temperature of the system is 40oC. The specific heat of aluminium is : (take 4.2 Joule =1 calorie)

The correct option is A 434J/kg−oCHeat lost by metal Blodg = Heat gain by H2O+ contain⇒m1C1ΔT1=(m2+w)C2ΔT2⇒0.20×C1×(150−40)=(150×10−3)C1=434ykg−1k−1

The correct option is A $434 J / k g -^{o} C$
Heat lost by metal Blodg $=$ Heat gain by $H_{2} O +$ contain
$\Rightarrow m_{1} C_{1} Δ T_{1} = (m_{2} + w) C_{2} Δ T_{2}$
$\Rightarrow 0.20 \times C_{1} \times (150 - 40) = (150 \times 10^{- 3})$
$C_{1} = 434 y k g^{- 1} k^{- 1}$