d) How many kilojoules of heat are released when 38.5 g of CH4(g) reacts completely with O2(g) at constant pressure?

Q: A small piece of calcium carbonate was placed in a constant-volume calorimeter (Ccal=0.488  kJ/°C),…

A: Given data :  1. Ccal=0.488 kJ/°C 2. Change in temperature = 3.5 oC

Q: calculate the enthalpy change for the following reaction: (3) FeCl₂(s) + Hg(1)→→→ Fe(s) + HgCl₂(s)…

A:

Q: A sample of polystyrene, which has a specific heat capacity of 1.880J·g−1·°C−1 , is put into a…

A:

Q: Given the standard enthalpy changes for the following two reactions: (1) 2Ni(s) + O₂(g) → 2NiO(s) AH…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be -18.4 kJ: Ca(OH)2…

A:

Q: When pure sulfuric acid is dissolved in water, heat is evolved. 10.65 g of pure sulfuric acid at…

A: If heat is liberated, the formula to determine the heat released is : q = m. C. ∆T Where  q = heat…

Q: Methanol, CH3OH, boils at 65°C. What is the enthalpy change during the process in which 16.0 g of…

A: Mass of liquid methanol    = 16 g specific heat of methanol  = 2.53Jg oC

Q: what is the heat evolved

A:

Q: if 0.0102 moles reacted and 476.5 J of heat were absorbed by the reaction in a coffee cup…

A:

Q: A generic solid, X, has a molar mass of 78.7 g/mol. In a constant-pressure calorimeter, 21.2 g of X…

A: Given,  Molar mass of solid X = 78.7 g/mole  Mass of X = 21.2 g  Mass of H2O = 299 g  Initial…

Q: 7) When 0.180 mole of sodium nitrate, NaNO, was dissolved in water in a constant-pressure…

A:

Q: The standard heat of combustion of gaseous cyclopentane, C5H10(g), was measured to be −3319.5…

A:

Q: if 0.0221 moles reacted and 633.2 J of heat were absorbed by the reaction in a coffee cup…

A: We will calculate the enthalpy of reaction using relation between heat and enthalpy

Q: The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride…

A:

Q: A bomb calorimeter, or constant volume calorimeter, is a device often used to determine the heat of…

A:

Q: When 20.0 g of aqueous solution B(aq) at 22.0°C is added to 60.0 g of aqueous solution A(aq), also…

A: Given that,The mass of the aqueous solution of B is 20.0 g.The mass of the aqueous solution of A is…

Q: You mix 125 mL of 0.320 M CSOH with 50.0 mL of 0.800 M HF in a coffee-cup calorimeter, and the…

A: The objective of the question is to calculate the enthalpy of reaction per mole of CsOH. The…

Q: You mix 125ml of 0.180 m csoh with 50.0 ml of 0.450 m hf in a coffee cup calorimeter and the…

A: Specific heat capacity is the amount of heat that is required to rise a temperature of 1 kg…

Q: You were tasked to find the enthalpy change in the reaction of an unknown salt with water using a…

A: a.) To calculate value of change in enthalpy , we use formula : ∆H = - q  where, q = value of heat ,…

Q: To make the perfect cup (approximately 252.6 mL) of hot chocolate, you are searching for a…

A: The mass of the 252.6 mL of chocolate, having a density of 1.06 g/mL, is;…

Q: When 23.6 g of calcium chloride, CaCl, was dissolved in water in a constant-pressure calorimeter,…

A: The mass of calcium chloride is = 23.6 g Increase in the temperature of the calorimeter is =…

Q: A generic solid, X, has a molar mass of 69.9 g/mol. In a constant-pressure calorimeter, 47.9 g of X…

A:

Q: Which of the reactions are exothermic? 2 Mg(s) + O,(g) → 2 MgO(s) + heat NH, (g) + HCI(g) → NH,CI(s)…

A: If heat is produced as one of product then the reaction is exothermic. If heat is used as reactant…

Q: A 63.5-g piece of an unknown metal is heated to 92.40°C and quickly added to 100.0 g of water in a…

A: Given, mass of unknown metal, mu=63.5 g initial temperature of metal, Tiu=92.40°C mass of water,…

Q: (d) Consider the complete combustion of Benzene (CeH6). If the density of benzene is 0.88 g/mL, what…

A: Given reaction is : 2C6H6 (l) + 15 O2 (g) ----------> 12CO2 (g) + 6H2O (g) , ΔH0rxn = -6278 KJ…

Q: When 23.6g of calcium chloride, Was dissolved in water in a constant pressure calorimeter, the…

A: For heat capacity ,heat and temperature ,there is a relation for all: q=c×△TWhere:q= Heat…

Q: chemical reaction has a negative enthalpy of reaction (-ΔHrxn) What does this tell you about the…

A: We have to find which option is correct

Q: (b) Calculate the gross calorific value of a coal from the following data: Mass of coal = 0.25 g,…

A:

Q: A generic solid, X, has a molar mass of 65.9 g/mol. In a constant‑pressure calorimeter, 20.5 g of X…

A: Calorimetry can be used to determine the heat transfer associated with a reaction by measuring the…

Q: Consider the following reaction: 2C6H6() + 15 O2(g)- 12 CO2(g) + 6 H20() AH = -5.869 x 103 kJ An…

A: Each reaction takes place account to their stoichiometric radio and account to those things the heat…

Q: When 0.615 g of sodium metal is added to an excess of hydrochloric acid, 6390 J of heat are…

A:

Q: what volume of CO2 gas in Liters is produced if this reaction occurs at a pressure of 748 torr and…

A: We have to find what volume of CO2 gas in Liters is produced if this reaction occurs at a pressure…

Q: 1) Glucose, C6H12O6 (MM = 180 g/mol), is converted into ethyl alcohol, C2H5OH(l) in the fermentation…

A:

Q: dissolution of one mole of NaOH in water releases 44.4 kJ of heat: H(s)→ Na*(aq) + OH*(aq) ΔΗ =…

A: Given: Heat of dissolution of 1 mole of NaOH in water releases 44.4 kJ.Given: Mass of sample of NaOH…

Q: (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) → 2Cl(g) I2(g)…

A: The formation of compounds from its atoms in their stable sates at standard pressure and temperature…

Q: A 1.110-g sample of benzoic acid (HC7H5O2; molar mass = 122.12 g/mol) is burned in an excess of…

A: This problem can be solved by using the equation :                             q=mc∆Twhere q is the…

Q: The standard enthalpy change for the following reaction is -1.20x10³ kJ at 29 2 Be(s) + O₂(g) →→→→2…

A: When divided thermochemical equation by 2 unit  then we also divide the enthalpy change value by two…

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.38 kg sample…

A: Answer: Heat capacity can be calculated by below shown formula: Q=nC∆TQn∆T=CC=Qn∆There:Q=heat…

Q: 3. 50.0 mL of 1.0 M sodium hydroxide and 50.0 mL of 1.0 M hydrochloric acid, both at 22.5 °C, were…

A: Given :---- Mass of sodium hydroxide solution (mNaOH) = 50.0 gMass of hydrochloric acid solution…

Q: When methanol, CH, OH, is burned in the presence of oxygen gas, O,, a large amount of heat energy is…

A:

Q: A chemist wastes a delicious brownie by burning it in a bomb calorimeter.  Before burning, the…

A:

Q: A scientist measures the standard enthalpy change for the following reaction to be 6.7 kJ : CO(g) +…

A:

Q: You mix 125 mL of 0.210 M CsOH with 50.0 mL of 0.525 M HF in a coffee-cup calorimeter, and the…

A: Volume and conc. of CsOH=125ml and 0.21MVol.  and conc. HF =50 ml and. 525MInitial temperature =…