I am trying to calculate the heat energy required to raise the temperature of a solution containing 34,624kg of silica, 7,252kg of water and 224kg of sulphuric acid from 298K to 423K (i.e delta T = 125K). This seems a simple problem; I have the respective specific heat capacities of silica, water and sulphuric acid as 745, 4.18 and 1.42 kJ/kgK.

I've used the equation Q = ΔT.Σmicp,I where I stands for species I.

I get the answer to be 3,228,205,500kJ which seems stupidly big!

Help! It's for an engineering design project with the deadline drawing ever closer!

I am trying to calculate the heat energy required to raise the temperature of a solution containing 34,624kg of silica, 7,252kg of water and 224kg of sulphuric acid from 298K to 423K (i.e delta T = 125K). This seems a simple problem; I have the respective specific heat capacities of silica, water and sulphuric acid as 745, 4.18 and 1.42 kJ/kgK.

I've used the equation Q = ΔT.Σmicp,i where i stands for species i.

I get the answer to be 3,228,205,500kJ which seems stupidly big!

Help! It's for an engineering design project with the deadline drawing ever closer!
don't you have to converse T into C value ?

No because it's a temp. difference, so they're the same.

I am trying to calculate the heat energy required to raise the temperature of a solution containing 34,624kg of silica, 7,252kg of water and 224kg of sulphuric acid from 298K to 423K (i.e delta T = 125K). This seems a simple problem; I have the respective specific heat capacities of silica, water and sulphuric acid as 745, 4.18 and 1.42 kJ/kgK.

I've used the equation Q = ΔT.Σmicp,i where i stands for species i.

I get the answer to be 3,228,205,500kJ which seems stupidly big!

Help! It's for an engineering design project with the deadline drawing ever closer!
yes Q= mc Dt, you need more information; the water you have is 125C, above 100C (steam) the c value is defferent... do you know at what temps. Silica or sulp. Acid change phase?. yes this is a very simple problem