Help with Chemistry! Reaaaaaalllyyyyyyy Stuck.?

1.Calculate the standard molar enthalpy of formation for sulfur dioxide. S(s) + O2 (g)---> SO2 (g) Given the thermochemical equations below. 2S (s) + 3 O2 (g)-------> 2 SO3 (g) enthalpy change= -791.5 kJ 2SO2 (g) + O2 (g) ---> 2SO3 (g) enthalpy change= -197.9 kJ 2. The specific heat... show more 1.Calculate the standard molar enthalpy of formation for sulfur dioxide.

S(s) + O2 (g)---> SO2 (g)
Given the thermochemical equations below.

2S (s) + 3 O2 (g)-------> 2 SO3 (g)
enthalpy change= -791.5 kJ

2SO2 (g) + O2 (g) ---> 2SO3 (g)
enthalpy change= -197.9 kJ

2. The specific heat capacity of aluminum is 0.897 J/g.K. What quantity of heat (in joules) is required to heat 15.0 g of Al from 22.0 degrees celsius to 75.0 degrees celsius?

3. Determine the heat of vaporization of Titanium(IV) chloride given the enthalpiesof reaction below.

Ti(s) + 2 Cl2 (s)---> TiCl4 (l) enthalpy change= -804.2 kJ

Ti(s) + 2 Cl2 (s)---> TiCl4 (g) enthalpy change= -763.2 kJ
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