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Physics

(a) A certain amount of heat will warm 1 g of material X by 10°C and 1 g of material Y by 40°C. Which material has higher specific heat capacity?

(b) Which material, X or Y, would you select to make a calorimeter?

(c) The specific heat capacity of a substance remains the same when it changes its state from solid to liquid. State True or False.

Calorimetry

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Answer

(a) Given,

Mass of X = mass of Y = m = 1 g

Change in temperature of X (△tX) = 10°C

Change in temperature of Y (△tY) = 40°C

Let,

Amount of heat = Q

Specific heat capacity of X = cX

Specific heat capacity of X = cY

Now,

For X,

Q = m × cX × ΔtX = 1 × cX × 10 = 10cX

For Y,

Q = m × cY × ΔtY = 1 × cY × 40 = 40cY

⟹ 10cX = 40cY

⟹ cX = 4cY

Hence, material X has higher specific heat capacity.

(b) Material chosen for calorimeter should have low specific heat capacity. So, here Y material should be used to make a calorimeter.

(c) False as the specific heat capacity of a substance does not remain the same when it changes state and it is phase dependant.

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