Assume that 4.19 3 106 kJ of energy is needed to heat a home. If this energy is derived from the combustion of methane (CH4), what volume of methane, measured at STP, must be burned? (AH'combustion for CH4 = - 891 kJ/mol)

Q: A sample of solid gold is heated with an electrical coil. If 15.3 Joules of energy are added to a…

A: q = mc∆T  q is the amount of heat energy absorbed m is the mass of substance  c is the specific heat…

Q: etermine the amount of heat (in kJ) given off when 1.86 x 10ª g of NOz are produced ccording to the…

A: Given, Mass of NO2 = 1.86 x 104 g  ∆H = -114.6 KJ/mol Molar mass of N = 14 g/mol Molar Mass of O =…

Q: Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, and hydrogen…

A: The balanced reaction of the formation of 9 kg HNO3 and theoretical yield -  NH3g +2O2g →HNO3g…

Q: Calculate the joules of energy required to heat 454 g of water from 5.4 °C to 98.6 °C.

A: Given: mass of water = 454 g Initial temperature of water = 5.4 °C Final temperature of water = 98.6…

Q: (a) A 2-inch piece of two-layer chocolate cake with frosting provides 1670 kJ of energy. What is…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: 6.56 Is AH positive or negative when 1 mol of water vapor con- denses to liquid water? Why? How does…

A: For an endothermic reaction, ∆H is positive whereas for an exothermic reaction, ∆H is negative

Q: A sample of liquid water is heated with an electrical coil. If 615 Joules of energy are added to a…

A:

Q: d) Calculate the heat gained by the water (qwater) in the calorimeter (in J) using the equation,…

A: Specific heat capacity is defined as the amount of heat required to raise the temperature of 1…

Q: A sample of gaseous krypton is heated with an electrical coil. If 47.2 Joules of energy are added to…

A: Q = m x s (T2 - T1) Where, Q = heat absorbed, m = mass in g, T1 = initial temperature, T2 = Final…

Q: Tt Uonsand Suppose a boil water notice is sent out advising all residents in the area to boil their…

A: We need to boil 14L of water. 14L=14*1000ml=14000ml of water Natural gas is here methane. During…

Q: 1. Consider the combustion of liquid C₅H₈ in oxygen gas to produce carbon dioxide gas and water…

A: #1: Liquid C5H8 undergoes complete oxidation to form CO2(g) and H2O(g) as products. Hence C5H8(l)…

Q: An advertisement for a commercial hand warmer claims that the hand warmer works because a chemical…

A: Answer:- This question is answered by using the simple concept of exothermic reaction in which het…

Q: How many grams of C5H12

A: ∙Given:- mass =1.24kg or 1240g                    T1 Initial temperature=23.6°C…

Q: The thermite reaction, Fe2O3 + Al Al2O3 + Fe produces so much heat that the Fe product melts. This…

A:

Q: When a chemical reaction or a phase change occurs and energy is released to the surroundings then…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: what is ΔHcond for this substance

A:

Q: How many joules are required to heat 75 grams of water from -85 ˚C to 185˚C?  - use the following…

A: Given: Mass of water is 75 g. Specific heat of water (liquid) is 4.184.  Specific heat of water…

Q: a. Hydrogen cyanide is used in the manufacture of clear plastics such as Lucite and Plexiglas. It is…

A: The question is based on the reaction stoichiometry. evolution of heat means production of heat.…

Q: i actually have two questions that im having trouble with. 1.) If you have 21.8 g of a metal with a…

A: Hey, since there are multiple questions posted, we will answer first question. If you want any…

Q: Methanol (CH3OH) is also known as wood alcohol and can be used as a fuel. When one mole of methanol…

A: Molar mass of methanol= 32.04 g/mol 1453 kJ of heat is evolved by = 32.04 g of methanol 269 kJ of…

Q: If 10.27 kJ of heat is given off when 51.93 g of unknown acid condenses from vapor to liquid, what…

A: Condensation is a process of conversion of vapor to liquid. Enthalpy of condensation is the enthalpy…

Q: What volume of benzene (C6H6, d= 0.88 g/mL, molar mass = 78.11 g/mol) is required to produce 1.5 x…

A: Combustion reaction of benzene  2C6H6 + 15O2 ....> 12CO2 + 6H2O It is exothermic reaction.  dH =…

Q: If 24.0 kJ of heat are given off when 2.7 g of HCl condenses from vapor to liquid, what is AHcond…

A: Given that: Heat ∆H = 24.0 kJ Mass of HCl = 2.7 g ∆Hcond = ?

Q: A new alloy is designed for use in a car radiator. If the 17.6 kg radiator required 8.69 × 105 J of…

A:

Q: 2C4H10(g) + 13O2(g) → 8CO2(g) + 10H2O(1), AH° rsa=-5814 kJ/mol. How many grams of CO2 are generated…

A: Answer option B: 605.4 g of CO2 are generated per 1×104 kJ of heat released.

Q: 4. If 5.524 x 10°J of heat is applied to a 702.1 g sample of iron, by how many degrees Celsius will…

A:

Q: How much energy must be removed from 14.3 grams of gaseous oxygen in order to decrease the…

A: * Specific heat capacity :-  is the amount of                           heat required to raise…

Q: Calorimetry measures the heat transfer for chemical reactions. Find two foods n your house that you…

A: Mass of food = 2 g  Volume = 5L

Q: when butane (C4H10) in a cigarette lighter undergoes combustion, it evolves 2880 kJ per mole of…

A: When butane (C4H10) in a cigarette lighter undergoes combustion, it evolves 2880 kJ per mole of…

Q: Consider the combustion of liquid C₅H₈ in oxygen gas to produce carbon dioxide gas and water vapor.…

A: According to the policies, we can only answer first 3 subparts of a question at one time. You have…

Q: you plan to melt some old gold jewelry so that you can make something new. when it is right at the…

A: Since you have asked multiple question, we will solve the first question for you. If youwant any…

Q: How many joules of heat are absorbed when 1000g of water is heated from 18oC to 85oC? The specific…

A: We have to find how many joules of heat are absorbed when 1000g of water is heated from 18oC to…

Q: How many grams of carbon are present if it requires 57.5 kJ of energy to heat a sample from 20.0 to…

A:

Q: Q2: Fill in blank - 1. The volume of 0.5 mol of an ideal gas at STP is 2. The enthalpy of formation…

A:

Q: 6. A 5.00 g piece of lead is heated to 290.0 °C and then placed in 50.0 g of water at 25.0 °C in a…

A:

Q: Octane (112.224 g/mol) undergoes combustion to form carbon dioxide gas and water vapor: 2 C8H18 (l)…

A: Given, Octane (112.224 g/mol) undergoes combustion to form carbon dioxide gas and water vapor: 2…

Q: A sample of solid aluminum is heated with an electrical coil. If 164 Joules of energy are added to a…

A: Specific heat capacity is the amount of heat in Joules is required by the substance to raise its…

Q: A 27 g aluminum foil pan is used to roast vegetables.  The pan is put into a cold oven at 22 oC .…

A: The heat released or absorbed (q) by a substance when the temperature of that substance is raised is…

Q: If 335 g of water at 24.5°C absorbed 2.66 kj of energy, what is the final temperature of the water?

A:

Q: How much heat is generated from burning 3 moles of methane.

A: The combustion reaction of methane will produce carbon dioxide and water as per the reaction CH4 (g)…

Q: When methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is…

A: Given reaction:

Q: How many joules of heat are required to heat 68 g of lead from 20.4 oC to 74.8 oC?

A: Given, Mass of lead = 68g. Initial temperature = 20.40C. Final temperature = 74.80C.

Q: The specific heat of water is 4.184J/g-°C. How many joules of heat will be  removed from 2.00 g of…

A: Given: Decrease in the temperature of water = 20.0 oC And mass of water = 2.00 g

Q: A 4.31-g sample of octane is burned in a bomb calorimeter containing 2.00 × 10² g H2O. How much…

A: Given : Mass of water = 2.00 X 102 g And increase in temperature of water = 5.46 oC

Q: When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose…

A: Volume of water = 35 L Percent of heat generated = 15% Density of fuel = 0.78 g/ml Initial…

Q: A quantity of water is heated from 25.0 Degrees Celsius to 36.4 Degrees Celsius by absorbing 325…

A: Specific heat :-  The amount of heat required to raise the temperature of 1 gram of a substance…

Q: Acetylene, C 2 H 2 , is used in welding torches. It releases a lot of energy when burned in oxygen.…

A:

Q: The combustion of one mole of benzene, C6H6, in oxygen liberates 3268 kJ of heat. The products of…

A: Given,  The combustion of one mole of benzene, C6H6, in oxygen liberates 3268 kJ of heat  The…

Q: If 7.600 g C,H, is burned and the heat produced from the burning is added to 5691 g of water at 21…

A: Step : 1             Calculate the final temperature of water.

Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.    

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.