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17 Nov 2019

A .5.00g sample of octane c8h18 is burnt in a bomb calorimeter containing 200.00g of water.how much energy in (a) cal (b) joules is released if tge temperature of the water is increased 6.00 degree celsius.

B. Is the reaction endothermic of exothermic

C. What is enthalpy for the above reaction in kj/mol?

D. If enthalpy for the following reaction is -90kj/mol,how much heat is released if 35.0g of carbon burnt is an excess of oxygen
Cs + O2g= CO2g

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Nestor Rutherford
Nestor RutherfordLv2
7 Oct 2019

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Related questions

1- a) A 5.00 g sample of octane (C8H18) is burnt in a bomb calorimeter containing 200.0 g of water. how much energy in (a) cal (b) joules is released if the temperature of the water increase 6.00 °C?

B) Is the reaction endothermic or exothermic?

7. Write out a balanced combustion reaction for methane (CH4). Given that ΔHrxn for this reaction is -890 kJ/mol, what is ΔHrxn for the reaction of 0.5 mol CO2 with sufficient water, producing methane and oxygen?

8. Given that the specific heat of water is 4.184 J/gK, how much heat (in Joules) does it take to raise the temperature of 500.0 mL of water by 50.0∞C (density of water is 1g/mL)?

9. 25.0 mL of 2.00M HCl and 25.0 mL of 1.00M NaOH are mixed in a coffee cup calorimeter. The temperature increases from 25.6∞C to 28.2∞C. What is the enthalpy of the reaction?

10. If a sample of food is burned in a bomb calorimeter with a heat capacity of 15.2kcal/∞C and the temperature increases from 28.3∞C to 35.5∞C, what is the caloric content of the food (report answer in FOOD CALORIES).

11. Calculate the ΔHrxn for 2 S(s) + 3 O2(g) → 2 SO3(g), given the following:

S(s) + O2(g) → SO2(g), ΔHrxn = -296.8 kJ/mol

2 SO3(g) → 2 SO2(g) + O2(g), ΔHrxn = +198.4 kJ/mol

12. Write out a balanced reaction for formation of ethanol (C2H5OH(l)) from elements, assuming the most stable elemental form of carbon is C(graphite).

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