Q\4: Combustion 0.1 mole of propane in bomb calorimeter with excess amount of oxygen represented by reaction C3H8 (g) +50₂ (g) → 3C0₂(g) + 4H₂0 (1) If initial temp. of calorimeter was 25 C° & total thermal capacity 97.1 KJ.C-¹. The reaction leaded temp. rose to 27.282 C°. Determine AH & AE in unit of KJ 1 mole C3H8

Q\4: Combustion 0.1 mole of propane in bomb calorimeter with excess amount of oxygen represented by reaction C3H8 (g) +50₂ (g) → 3C0₂(g) + 4H₂0 (1) If initial temp. of calorimeter was 25 C° & total thermal capacity 97.1 KJ.C-¹. The reaction leaded temp. rose to 27.282 C°. Determine AH & AE in unit of KJ 1 mole C3H8

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter2: The First Law Of Thermodynamics

Section: Chapter Questions

Problem 2.32E: Many compressed gases come in large,heavy metal cylindersthat are so heavy that they need a special...

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Many compressed gases come in large,heavy metal cylindersthat are so heavy that they need a special cart to move them around. An80.0-Ltank ofnitrogen gas pressurized to 172 atm is left in the sun and heats from its normal temperature of 20.0C to 140.0C. Determine a the final pressureinsidethe tank and b the work, heat, and U of the process. Assume that behavior is ideal and the heatcapacity of diatomic nitrogenis 21.0J/mol.K.
The following are values of heat capacity for nitrogen gas; Temp K Cv J/mol. K 300 20.8 400 20.9 500 21.2 600 21.8 700 22.4 800 23.1 900 23.7 1000 24.3 1100 24.9 Using the general formula Cv = A BT C/T2, find values of A, B, and C that fit the given data.
When one mol of KOH is neutralized by sulfuric acid, q=56 kJ. (This is called the heat of neutralization.) At 23.7C, 25.0 mL of 0.475 M H2SO4 is neutralized by 0.613 M KOH in a coffee-cup calorimeter. Assume that the specific heat of all solutions is 4.18J/gC, that the density of all solutions is 1.00 g/mL, and that volumes are additive. (a) How many mL of KOH is required to neutralize H2SO4? (b) What is the final temperature of the solution?
What is the change in internal energy when a gas contracts from 377mL to 119mLundera pressure of 1550 torr, whileat the same time being cooled by removing 124.0J ofheat energy?
In the 1880s, Frederick Trouton noted that the enthalpy of vaporization of 1 mol pure liquid is approximately 88 times the boiling point, Tb, of the liquid on the Kelvin scale. This relationship is called Troutons rule and is represented by the thermochemical equation liquid gas H = 88 Tb, joules Combined with an empirical formula from chemical analysis, Troutons rule can be used to find the molecular formula of a compound, as illustrated here. A compound that contains only carbon and hydrogen is 85.6% C and 14.4% H. Its enthalpy of vaporization is 389 J/g, and it boils at a temperature of 322 K. (a) What is the empirical formula of this compound? (b) Use Troutons rule to calculate the approximate enthalpy or vaporization or one mole of the compound. Combine the enthalpy of vaporization per mole with that same quantity per gram to obtain an approximate molar mass of the compound. (c) Use the results of parts (a) and (b) to find the molecular formula of this compound. Remember that the molecular mass must be exactly a whole-number multiple of the empirical formula mass, so considerable rounding may be needed.
a) What is the standard enthalpy of reaction per mole of either HCl or NaOH when 50.00 cm3 of 0.1 moldm-3 of hydrochloric acid (HCl) and 50.00 cm3 of 0.1 moldm-3 of sodium hydroxide (NaOH) are mixed? According to your simulation, the temperature rose by 0.68 oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1) Show your working below:
a) What is the standard enthalpy of reaction per mole of either HCl or NaOH when 50.00 cm3 of 0.1 moldm-3 of hydrochloric acid (HCl) and 50.00 cm3 of 0.1 moldm-3 of sodium hydroxide (NaOH) are mixed? According to your simulation, the temperature rose by 0.68 oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1) b) What is the standard enthalpy of reaction per mole of KOH when 50.00 cm3 of 1.0 moldm-3 of Nitric Acid (HNO3) and 50.00 cm3 of 1.0 moldm-3 of Potassium Hydroxide (KOH) are mixed? According to your simulation, the temperature rose by __6.81__ oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1)
What is the standard enthalpy of reaction per mole of either HCl or NaOH when 50.00 cm3 of 0.1 moldm-3 of hydrochloric acid (HCl) and 50.00 cm3 of 0.1 moldm-3 of sodium hydroxide (NaOH) are mixed? According to your simulation, the temperature rose by ___0.68__ oC. (Density of water = 1gcm-3, Specific heat capacity of water = 4.18 J g-1 oC-1) Show your working below: HCl (aq) + NaOH(aq) à NaCl(aq) + H2O(l)
A sample of solid biphenyl weighing 0.5260 g was ignited in a bomb calorimeter initially at 25.0°C, producing a temperature rise of 1.910 K. Determine the internal energy (∆U) of combustion. To properly determine the internal energy of combustion for the solid biphenyl, the calorimeter was first calibrated. a)A 0.7750 g sample of benzoic acid (C₆H₅COOH, MW 122.1 g/mol)) was ignited under identical conditions and produced a temperature rise of 1.940 K. For benzoic acid, the internal energy combustion at constant volume, ∆U, is known to be –3226 kJ/mol. Calculate the calorimeter constant, in kJ/K. b)using the caloremeter constant, determine triangleU, in KJ/mol, for the conbustion of solid biphenyl ((C6H5)2, MW 154.21 g/mol)
The specific heat of compound AB(s) was determined using coffee-cup calorimeter. When 1.750 g of AB(s) was mixed with 15.00 mL deionized distilled water at room temperature, only 0.850 grams of the compound was dissolved. The temperature of the heterogenous mixture was decreased by 1.70K.Prior to this, the calorimeter was calibrated using a 15mL aqueous reaction mixture that initially contains 0.070 moles each of HBr and KOH. The recorded ΔT is +5.75K. Note: H+(aq) + OH -(aq) → H2O(l) ΔH = -55.85 kJ/molAB(s) ⇌ A+(aq) + B-(aq) ΔH = 88.75 kJ/molspecific heat (H2O) = 4.184 J/g°CMM of AB = 65 g/mol What is the specific heat of solid AB compound (in J/g°C)?
Calculate the heat released/absorbed by the reaction (qrxn) between nitric acid and potassium hydroxide. Express your answer in kJ. Given: A newly made Styrofoam ball calorimeter was first calibrated by mixing in it 10.0 mL of 0.40 M hydrochloric acid and 0.1008 g magnesium oxide (MW = 40.30 g/mol; specific heat = 0.276 kJ/g°C). The reaction enthalpy (ΔHrxn) of HCl and MgO is -139.6 kJ/mol. The temperature change was recorded to be 5.5 °C. After calibration, the calorimeter was used to determine reaction enthalpy of nitric acid and potassium hydroxide by mixing in it 5.0 mL of 0.40 M HNO3 and 5.0 mL of 0.80 M KOH. The temperature change was recorded to be 1.0 °C.
The standard enthalpies of formation, at 25.00 oC, of methane (CH4(g)), water (H2O(l)), and carbon dioxide (CO2(g)) are -74.6 kJ/mol, -285.8 kJ/mol, and -393.5 kJ/mol respectively. Calculate the heat released (in kJ) during combustion of 18.84 L of methane under a constant pressure of 1,000 atm at 25.00 oC (N.B., combustion is the reaction of a substance with molecular oxygen to produce water and carbon dioxide).