Please I need your sincere help with this problems

Problem 1

How much heat is released when a mixture containing 10.0 g CS2 and 10.0 g Cl2

CS2 + 3Cl2 -------- S2Cl2 + CCl4

Delta H = -230 kJ

Answer

10.0 g CS2 X 1 mol CS2/76.15 g X 3 mol Cl2/1 mol CS2 = 0.39395929 Cl2

10.0 g Cl2 X 1 mol Cl2/ 70.90 g X 1 mol CS2/3 mol Cl2 = 0.04701457 CS2

LR

10.0 g Cl2 X 1 mol Cl2/ 70.90 g = 0.14104372 mol Cl2

Delta H = -230 kJ/3 mol Cl2 X 0.14104372 mol Cl2 = -10.8 kJ

Problem 2

NH4NO3----- N2 + O + 2H2O

Delta Heat= -30 Kcal

NH4NO3--2.5 Tons

How much water 0---100 C in tons

2.5 tons NH4NO3 X 2000 lb / 1 ton X 453.59 g/ 1lb = 1 mol/80.05 g

= 2.8 X 10 (4) mol NH4NO3

-30 Kcal/1mol NH4NO3 X 2.84 X 10 (4) mol NH4NO3

= 8.5 X 10 (5) Kcal X 1000 = 8.5 X 10 (

cal

8.5 X 10 (

cal/100 C X 1g C/1 cal X 1lb/453.59 g X 1Ton/2000 =9.25 Tons

Problem 3

2 Na + 2 H2O---- 2 NaOH + H2

Delta H = -3686 kJ

1.0 g 2Na

1.0 g 2H2O

How much heat???

1.0 g Na X 1 mol Na/22.99 g X 2 mol H2O/2 mol Na = 0.0434971727 H2O

1.0 g H2O X 1 mol H2O/ 18.02 g X 2 mol Na/2 mol H2O = 0.0554938957 Na

LR

1.0 g Na X 1 mol Na/ 22.99 g = 0.0434971727 mol Na

Delta H = -3686 kJ/2 mol Na X 0.0434971727 mol Na = -80 kJ

Problem 4

H2 + .5 O2 ----- H2O

Delta H = -58 Kcal

O2 629,340 Kg

H2 106,261 Kg

a. How many calories are emitted from launch?

b. If I were to take energy to heat up a pan...how much water can I heat from 0 to 100 C?

Answer

629,340 kg X 1000 = 6.2934 X 10 (

g O2 * 1 mol O2/16.00 g O2 * 1 mol H2/ .5 mol O2 = 7.86675 X 10 (7) mol H2

106,261 kg X 1000 = 1.06261 X 10 (

g H2 * 1 mol H2/2.016 g H2 * .5 mol O2/ 1 mol H2 = 2.6354414 X 10 (7)

Limited Reactant

106,261 kg X 1000 = 1.06261 X 10 (

g H2 * 1 mol H2/2.016 g H2

= 5.2708829 X 10 (7) H2

-58 Kcal/1 mol H2 * 5.2708829 X 10 (7) H2 = -3.057112103 X 10(9) kcal X 1000 = -3.0571121 X 10 (12) cal

-3.06 X 10 (12) cal * 1g C/1 cal X 1/100 C X 1lb/453.59 g X 1 ton/ 2000 lb = -33699 Tons of Water

I'm not sure about the last problem

Are these answers correct?

Please advice

Thanks

Lindsay