Question

 A 4.50 g sample of sugar C5H10O5 (molar mass= 150.0 g/mol) was burned in excess 

oxygen in a bomb calorimeter according to: C5H10O5(s) + 5O2(g) →5CO2(g) +5H2O(l)

If the heat capacity of the calorimeter and its contents was 16.0 kJ/°c, and the 

temperature rose from 25. 0 °C to 26. 5 °C, calculate ΔH in Kj/mol for the combustion 

reaction.

Answer 1

Moles of $C_5H_{10}O_5=\frac{4.50}{150}=0.03moles$

Change in temperature = $26.5-25=1.5$ °c