Many portable gas heaters and grills use propane, C3H$(g). Using enthalpies of formation, calculate the quantity of heat produced when 19.0 g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming. Express the heat in kilojoules to three significant digits. ? 오 = kJ

Q: density of water = 1.00 g/ mL The enthalpy changes when a strong acid is neutralized by strong base…

A: Given molar enthalpy of neutralization = - 56.1 kJ/mol  The thermochemical equation can be written…

Q: If a system has 42.0 J of heat added to it, and the system does 25.0 J of work on its surroundings,…

A: According to the first law of thermodynamics, the provided heat is used in increasing the the…

Q: if a system does 25 J of work on its surroundings and is cooled by 35 J, what is the net energy…

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Q: Calculate the heat that must be supplied to a 500.0 g stainless steel vessel containing 450.0 g of…

A: The specific heat can be defined as the amount of heat per unit mass that is needed to raise the…

Q: An unknown metal with mass (2.480x10^1) g absorbs (6.15x10^1) J of heat. The temperature of this…

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Q: If a system produces 123.0 kJ of heat and does 45.0 kJ of work on the surroundings, what is the AE…

A:

Q: If a system absorbs 155.0 kJ of heat from its surroundings and the system does 65.0 kJ of work on…

A: Given that, System absorb heat, so q is positive, so,  q=+155.0 KJ also given, system does work, so…

Q: If a system has 62.0 J of heat added to it, and the system does 25.0 J of work on its surroundings,…

A: Dear student,  Since it is not mentioned that which question you want to ask out of these two…

Q: What is the change in internal energy for a system if the system absorbs 537 kJ of heat and does…

A: We have given that  Heat absorbed by system =q= 537KJ  Work done by system is always negative   W =…

Q: C 2H 5OH() + 30 2( g)→ 2CO 2( g) + 3H 20( ) AH=-1.37 x 10 3 kJ I. The reaction is endothermic II.…

A: Exothermic reaction is the reaction in which energy is released in the formation of products while…

Q: A system receives 225 J of heat from the surroundings and delivers 428 J of work. What is the change…

A: The first law of thermodynamics states that "energy can neither be created nor destroyed , but can…

Q: what is the amount of internal energy (in joules) for a system that has performed 1478.714 J of work…

A: The internal energy of a system can be changed in two ways: (i) By allowing heat to flow into the…

Q: 1. Calculate the change in the internal energy of the system for a process in which the system…

A: "To get remaining sub-parts solved please repost the complete question and mention the sub-parts to…

Q: After absorbing 1.690 kJ of energy as heat, the temperature of a 0.500-kg block of copper is 43 °C.…

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Q: A gas does 135 J of work while expanding and, at the same time, absorbs 156 J of heat. What is its…

A: Given :-  heat absorbed by system = 156 J  work done by gas = 135 J To calculate :- ∆U(in J)

Q: A system receives 825 J of heat and delivers 825 J of work to its surroundings. What is the change…

A: Given:Heat received by system, dQ = 825Jwork done by system, dW=825Jchange in internal energy, dU…

Q: What is the change in internal energy of a system that has 275 kcal of work done to it and it…

A: Internal energy is a function of the volume and the temperature. In a closed system of constant…

Q: What is the change in internal energy (in J) of a system thatabsorbs 0.615 kJ of heat from its…

A: The relation between change in energy, heat, and work is given as: ∆E=q+w

Q: A certain chemical reaction releases 21.4 kJ/g of heat for each gram of reactant consumed. How can…

A: 38520kj heat produced by the consumption of 1.8kg of reactant.

Q: What is the change in internal energy in joules for a system that releases 154 J of heat and does…

A: Since the relationship between work, internal energy change and heat released is given by  ΔE=…

Q: If a system absorbs 155 kJ of heat from its surroundings and the system does 95 kJ of work on its…

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Q: In a calibration of a calorimeter, 50.3 g of water at 60.5 degrees celsius is added to 48.7 g of…

A: Given : mass of cold water = 48.7 g Mass of hot water = 50.3 g Initial temperature of hot water =…

Q: If a system has 38.5 J of heat added to it, and the system does 75.5 J of work on its surroundings,…

A: According to the first law of thermodynamics,change in internal energy i.e∆U can be calculated by…

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Q: A system receives 315J of heat and delivers 200. J of work to its surroundings, what is the change…

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Q: Consider the dissolution of ammonium nitrate according to the following equation: NH,NO3(s) → NH,…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3 sub-parts. Please resubmit the…

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A: Given, Amount of heat absorbs by the system q = 155 kJ work done by the system W = 45 kJ We are…

Q: What is the AE of a system if 184 kJ of work is done on the system and it loses 267 kJ of heat?

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Q: what quantity of heat energy must have been applied to a block of aluminum weighing 38.4g of the…

A: The total heat required (Q) is determined as follows. Q=mAlcAl∆T ...... (1)

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Q: When 0.670 g of sodium metal is added to an excess of hydrochloric acid, 6970 J of heat are…

A: moles= mass/molar mass 2 Na(s) + 2 HCl(aq)-----> 2 NaCl(aq) + H2(g)                  Or  Na(s) +…

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Q: A system receives 425 J of heat and delivers 425 J of work toits surroundings. What is the change in…

A: According to first law of thermodynamics, ∆U = ∆Q - ∆W

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Q: When 745 J of energy in the form of heat is transferred from the environment to a gas, the expansion…

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Q: Nitrogen monoxide, a gas recently found to be involved in a wide range of biological processes,…

A: Exothermic reaction: When heat is evolved by the system i.e. the value of ∆H°rxn is negative.…

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Q: If a system has 20.5 J of heat added to it, and the system does 75.5 J of work on its surroundings,…

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Q: When a 13.3 g sample of NaOH(s) dissolves in 386.0 mL water in a coffee cup calorimeter, the…

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Q: If a system absorbs 155.0 kJ of heat from its surroundings and the system does 35.0 kJ of work on…

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Q: When 100 mL of 0.200 M NaCl(aq) and 100 mL of 0.200 M AgNO3(aq), both at 21.9 °C, are mixed in a…

A: Given that  Initial temperature = 21.9 °C Final temperature = 23.5 °C To calculate the amount of…

Q: If a system has 225 kcal of work done to it, and releases 5.00 x 10² kJ of heat into its…

A: Given, Work done on the system W=225 Kcal    {As work is done by the system , so  W is +ve} Heat…

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A:

Q: A 10.0 g sample of pure acetic acid, CH,CO,H is completely burned. The heat released warms 2.00 L of…

A: Given that -  Mass of acetic acid = 10.0 g  Volume of water = 2.00 L = 2000 mL  Initial temperature…

Q: A 15.0-mL sample of benzene at 21.3 °C was cooled to its melting point, 5.5 °C, and then frozen. How…

A: Given, density of benzene = 0.80 g/mL Volume of the solution = 15.0 mL  Mass of benzene = Density x…

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.