Question

Help with this enthalpy question!?
When 1g of oxalic acid (H2C2O4) is burned in a bomb calorimeter whose heat capacity is 8.75kJ/K the temperature increases by 0.312 K. The enthalpy of combustion of oxalic acid at 27 C is?

Answer 1

Answer: 2.73 kJ = 2730 J

Explanation:

Heat released = Heat absorbed

$Q= m\times c\times \Delta T$

Q= heat gained  or released

m= mass of the substance = 1 g

c = heat capacity of calorimeter = 8.75 kJ/K      

$\Delta T={\text{Change in temperature}}=0.312K$  

$Q=1g\times 8.75kj/K\times 0.312K^$

Q = 2.73 kJ  = 2730 J