A solution of 6.3 g of haemoglobin $(m o l a r m a s s = 64, 000 g / m o l)$ in 25 ml of solution
shows a temperature rise of $0.03 ° C$ for complete oxygenation. Each mole of haemoglobin binds 4 moles of oxygen. If the heat capacity of the solution is $4.2 J / K - m l,$ then the amount of heat released per mole of oxygen bound (in KJ) is

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answer is 8.

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Detailed Solution

Heat released by $\frac{6. 3}{64000}$ mole haemoglobin $= 25 \times 4.2 \times 0.03 = 3.15 J$
Heat released per mole haemoglobin $= \frac{3.15 \times 64000}{6 .3} = 32000 J$

= $\frac{32000}{4} = 8 k J$

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