- #1

MathewsMD

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## Homework Statement

A sample of sulfur, mass 2.56g, is burned in excess oxygen inside a calorimeter of heat capacity 923 J/K and insulated by 815g of water. If the sole product of combustion is SO

_{2(g)}, what is the expected increase in temperature?

## Homework Equations

q = mcΔT

q = CΔT

## The Attempt at a Solution

I am given that the ΔH

^{o}

_{f}= -296.8 kJ/mol for SO

_{2(g)}and the enthalpy of formation of oxygen gas and sulfur is 0.

S

_{(s)}+ O

_{2(g)}→ SO

_{2(g)}

So, I did:

(1g / 32.06 g/mol)(-296.8 kJ/mol) = - [(4.184 g/molK)(815g)ΔT + (923 J/K)(ΔT)]

After isolating for ΔT and converting units to J, i found my answer as 2.136 K but this is incorrect. Any comments on where I went wrong? Thanks!