A 17.5 g sample of a candy bar is burned in a bomb calorimeter, which has...

A 17.5 g sample of a candy bar is burned in a bomb calorimeter, which has a heat capacity of 9.25 kJ/°C. The temperature increases from 19.7°C to 57.3°C.

What is the fuel value of the candy bar? In kJ/g

How many Calories are in a 77.7 g candy bar? 1 Cal = 4.184 kJ. In Cal

Expert Solution

Heat released of combustion = CT

= 9.25KJ/⁰C*(57.3-19.7)⁰C

= 347.8KJ

Heat released of combustion per g = 347.8Kj/17.5g

= 19.874KJ/g

b

The heat released of 77.7g of candy bar = 19.87KJ/g*77.7g

= 1543.9KJ

= 1543.9cal/4.184 [ 1 Cal = 4.184 kJ ]

= 369cal>>>>answer

queen_honey_blossom answered 1 year ago

a 5.00 g sample of TNT (C7H5N2O6) is burned in a bomb calorimeter with a heat...

a 5.00 g sample of TNT (C7H5N2O6) is burned in a bomb calorimeter with a heat capacity of 420 J/degreeC. The calorimeter contained 610 grams od water (4.18J/gdegreeC) and the temperature of the water was measured to go from 20.0 degree C to 22.5 degree C. What is the heat of combustion of TNT?. I know the answer, but can you give me a step by step explanation of how to get it?

A 21.8 g sample of ethanol (C2H5OH, 46.07 g/mol) is burned in a bomb calorimeter, according...

A 21.8 g sample of ethanol (C2H5OH, 46.07 g/mol) is burned in a bomb calorimeter, according to the following reaction equation. If the temperature of the rises from 13.0 °C to 79.3 °C, what is the heat capacity of the calorimeter? C2H5OH(l) + 3 O2(g) →2 CO2(g) + 3 H2O(g) ΔH°rxn = –1235 kJ

A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat...

A 1.800 g sample of octane, C8H18, was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/°C. The temperature of the calorimeter plus contents increased from 21.59°C to 29.44°C. What is the heat of combustion per gram of octane? What is the heat of combustion per mole of octane? In a bomb calorimeter (where pressure is NOT constant) what is the heat of reaction equal to?

If 3.305 g of ethanol C2H5OH(l) is burned completely in a bomb calorimeter at 298.15 K,...

If 3.305 g of ethanol C2H5OH(l) is burned completely in a bomb calorimeter at 298.15 K, the heat produced is 97.70 kJ . A) Calculate ΔH∘combustion for ethanol at 298.15 K B) Calculate ΔH∘f of ethanol at 298.15 K.

3.11 g of toluene (C7H8) is burned in a bomb calorimeter. The following reaction occurs. C7H8(l)...

3.11 g of toluene (C7H8) is burned in a bomb calorimeter. The following reaction occurs. C7H8(l) + 9 O2(g) → 7 CO2(g) + 4 H2O(l) The temperature of the calorimeter changes from 24.2°C to 40.1°C. Given that the heat capacity of the calorimeter is 8.32 kJ/°C, find the amount of heat generated per mole of toluene. ___ kJ/mol toluene

A 1.000 g-sample of a compound undergoes combustion in a bomb calorimeter. The temperature of the...

A 1.000 g-sample of a compound undergoes combustion in a bomb calorimeter. The temperature of the calorimeter rises from 12.0 oC to 70.8 oC. If the heat capacity of the calorimeter is 810.1 J/oC, determine the change in internal energy for the combustion reaction, ΔΔ ΔΔErxn, in kJ/mol. The molar mass of the compound is 142.32 g/mol. What is the energy change associated with 3.5 mol of D being formed? 2 B + C ⟶⟶ ⟶⟶ D + E ...

A 1.00 g sample of coffee beans was completely combusted in a bomb calorimeter (Ccal =...

A 1.00 g sample of coffee beans was completely combusted in a bomb calorimeter (Ccal = 62.1 J/o C) and caused the temperature of the water in the calorimeter to increase from 24.66 K to 27.22 K. What is the change in temperature of the water in degrees Celsius? The heat released by the coffee beans was: ? One cup of black coffee is made from 237 g of coffee beans. How many Calories are in one cup of black...

A 0.623 g sample of vanillin (C8H8O3, MM = 152.15) is combusted in a bomb calorimeter...

A 0.623 g sample of vanillin (C8H8O3, MM = 152.15) is combusted in a bomb calorimeter with a heat capacity of 5.89 kJ/ºC. Given that the heat of combustion of vanillin is -3.83x103 kJ/mol, what must the temperature change have been in the bomb calorimeter?

When a 3.125 g sample of ammonium nitrate decomposes in a bomb calorimeter with a heat...

When a 3.125 g sample of ammonium nitrate decomposes in a bomb calorimeter with a heat capacity of 4.116kJ/C the temperature rises from 24.15 degrees C to 25.35 degrees C. What is delta E for the decomposition of ammonium nitrate Nh4NO3 --> N2O + 2 H2O

A. When a 0.235-g sample of benzoic acid is combusted in a bomb calorimeter, the temperature...

A. When a 0.235-g sample of benzoic acid is combusted in a bomb calorimeter, the temperature rises 1.644 ∘C . When a 0.275-g sample of caffeine, C8H10O2N4, is burned, the temperature rises 1.585 ∘C . Using the value 26.38 kJ/g for the heat of combustion of benzoic acid, calculate the heat of combustion per mole of caffeine at constant volume. B. Assuming that there is an uncertainty of 0.002 ∘C in each temperature reading and that the masses of samples...

Question