(a) If 10.6 moles of water at 35°C absorbs 12.30 kJ, what is the final temperature of the water? The specific heat of water is 4.184 J/g-°C.

Q: 9. If 2,035 cal of heat is added to a 500.0 g sample of water at 35.0°C, what is the final…

A: Given:mass of water= 500ginitial temperature, t1= 35∘Cheat supplied to water, H=2035calto find,…

Q: How much heat (in joules) is used to heat an 80.88-gram sample of iron from 3.59 °C to 100 °C if the…

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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: 1. If a 100-kg sample of aluminum at 25.0 °C is heated with 500 kJ of heat energy, what will be the…

A: The heat absorbed by the aluminium is given by: where m= mass of metal = 100 kgIni q= total heat…

Q: 2. Thirty-two joules of heat is added to a 255 gram iron bar How much will the iron bar's…

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Q: A substance increases in temperature by 255°C when a 983g sample of it absorbs 83,200J of heat.…

A:

Q: What is the change of internal energy in J of a system that releases 675 J of heat and has 875 J of…

A: According to first law of thermodynamics, we have : dU = q + w  ----(1) Where dU is change in…

Q: How much heat must be applied to a 40.2g sample of gold (s=0.129 J(g∙℃)) in order to raise its…

A: Given information:Mass of gold = 40.2 gInitial temperature = 28.2 ˚CFinal temperature = 351.5…

Q: You wish to heat water to make coffee. How much heat (in joules) must be used to raise the…

A: We have to apply formula Q=mc∆T Here Q is the heat needed to raise temperature c is specific heat m…

Q: How many kilojoules of heat are released when 38.2 g of CH4 (g) reacts completely with O2 (g) to…

A: mass of CH4 = 38.2 g Chemical reaction - 2CH3OH → 2CH4 + O2                H = +252.8 kJ

Q: rial typically used to heat metal radiators is water. If a 5°C, what mass of water was needed to…

A: Given data set: Specific heat of water = 4.184 J/g C Change in Temperature = 79.5 °C We need to…

Q: How much energy is required to heat 120.0 grams of water from 2.0oC to 24.0oC? The specific heat of…

A: Given: mass of water, m=120.0 ginitial temperature of water, T1 = 2.0∘CFinal  temperature of water,…

Q: How many joules of heat is needed to heat a 10g of aluminum foil from 55°C to 93°C if aluminum has a…

A: Specific heat is the amount of heat required for a unit mass of substance through a 1-degree…

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: 2. How much heat, in joules, is required to raise the temperature of 1.82 Kg of water by 3.32°C?

A: Rise in Temperature (∆T) =3.32 °C  Mass of water (m) = 1.82 kg = 1.82 × 103 g Heat (q) =?

Q: 5. If 769J of heat is absorbed when 50g of iodine is heated from 70°C to 95°C, then what is the…

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Q: You wish to heat water to make coffee. How much heat (in joules) must be used to raise the…

A: Given- Weight of water = 0.150 kg = 150 gm (1 kg = 1000 gm) T1= 26°C  T2= 97°C Specific heat…

Q: 4. What is the specific heat of iron, if it requires 1050 J of heat energy to raise the temperature…

A: Heat required = 1050 J Initial temperature = 10.0°C Final temperature= 20.4°C Change in temperature…

Q: 2. What is the heat capacity of 25.0 g of ethyl alcohol if its specific heat is 2.42 J/g C?

A: Given is 25.0 g ethyl alcohol  Heat capacity  = Hc = 2.42 J/g°C Specific heat = ?

Q: If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g•°C) that…

A: Given,  specific heat = 0.450 J/g.oC heat = 801 J , mass = ? , ∆T= 120°C - 22.5°C = 97.5°C

Q: How much heat (in kJ) is required to raise the temperature of a 525.0 mL sample of water from 22.1 C…

A: The heat required to raise the temperature is directly proportional to the mass of sample and the…

Q: 7. When 0.63 g of solid LiCI (AHsoln = – 37.1 kJ/mol) dissolves in 5 L of water, how much heat is…

A: Answer :-  Heat released (q) when 0.63 g LiCl dissolved in 5 L water = -552.8 (J) = -0.5528 (kJ)…

Q: 1. A system receives 425 J of heat and delivers 425 J of work toits surroundings. What is the change…

A: We have to calculate the change of internal energy of system.

Q: 1. How much work was done when 46 kJ of energy was spent on compressing a gas as it released 28 kJ…

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Q: What is the specific heat of lead if it takes 97.8 JJ to raise the temperature of a 75.1 g block by…

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Q: 3. 842 J of works was done for a gas to be compressed. At the same time, it releases 451 J of heat.…

A: Given -> Work = +842 J ( work done on the system) Q = -451 J ( heat released)

Q: If 801 J of heat is available, what is the mass in grams of iron (specific heat = 0.45 J/g･°C) that…

A: Q = heat =801 J ΔT = change in temperature = (120 - 22.5) = 97.5 oC c = Specific heat = 0.45 J/goC…

Q: If 200g of water at 20°C absorb41840 J of energy, what will the final temperature be? The specific…

A: Given: Mass of water=200 g Temperature change, ∆T=(T-20.0)°C Heat absorbed, q =41840 J Specific…

Q: What is the specific heat in J/g°C for a metal sample with a mass of 78.9 g which absorbs 753 J of…

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Q: What are the internal energy changes, ∆E, if a system; (a.) absorbs 67 J of heat and does 67 J…

A: Answer to all the parts are given below.

Q: What is the specific heat of lead if it takes 98.0 J to raise the temperature of a 75.4 g block by…

A: Given :- heat absorb = 98.0 J  mass of lead block = 75.4 g  change in temperature of block = 10.5°C…

Q: Iron reacts with oxygen to form one mole iron (III) oxide releasing 826 kJ of heat. How much heat is…

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Q: 9. What would be the final temperature if 8.94 x 103 joules of heat were added to 454 grams of…

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Q: 2. What is the work done by a system whenabsorbs 47 J of heat and gain 12 J of energy?

A:

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

Q: What is the specific heat of a material when 55.2 g of it change temperature by 35.8 °C when it…

A: We have given that  Q= 4526J  Temperature change =∆T= 35.8°C  Mass of material = 55.2g  Specific…

Q: How much energy is needed to raise the temperature of 325g of water by 10.0 degrees? The specific…

A: Thermodynamics is branch of chemistry in which we deal with heat of reaction.

Q: How much thermal energy (in joules) is required to heat 18.1 g of a metal (specific heat = 0.397 J/g…

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Q: • The temperature of a 35.2 g sample of iron increases from 23.7 °C to 29.5 °C. If the specific heat…

A: Given:: Mass of Fe, m=35.2 g  Initial, T1=23.7℃ = (23.7 +273) K=296.7℃ Final, T2= 29.5 ℃= (29.5+273)…

Q: If 901 J of heat is available, what is the mass in grams of iron (specific heat = 0.45 J/g･°C) that…

A: Given data: Heat = 901 J Specific heat = 0.45 J/g.℃ Initial temperature = 22.5 ℃ Final temperature =…

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,…

A: Given:  Heat consumed by the system is 20.5 J, and the work done by the system on the surrounding is…

Q: A gas expands and does work on the surroundings equal to 1.95 L atm. At the same time, it releases…

A:

Q: What is the specific heat of a material when 55.2 g of it change temperature by 35.8 degrees C when…

A: Use the formula as : Amount of heat absorbs (q) = Mass of substance (w) x specific heat capacity of…

Q: How much energy, in J, is required to raise the temperature of 1 kg of water from 37oC to 39.5oC?…

A: Given, The energy, in J, is required to raise the temperature of 1 kg of water from 37oC to 39.5oC…

Q: If 50.0 g of benzene, C6H6, at 25.0°C absorbs 2.71 kJ of energy in the form of heat, what is the…

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Q: 2. A solid substance has a mass of 250 grams. It is cooled by 25.00°C and loses 4.937 kJ of heat.…

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Q: 3. How much heat is required to rise the temperature of 0.5 kg water from 30°C to its boiling point?…

A: Question 3. Given that, the mass of water is m = 0.5 kg. The initial temperature is T1 = 30oC =…

Q: How much energy is evolved as heat when 0.1 L of water at 0 degrees celcius solidifies to ice. (The…

A: The density of water at 0oC is 0.99987 g/mL. The mass of 0.1 L of water at 0oC is; 1.0 L=1000.0…

Q: How much heat, in joules, must be added to a 5.00 × 102-g iron skillet to increase its temperature…

A: The heat is given by: q = m × c × ∆Tq = heatm = massc = specific heat∆T = change in temperature

Q: The specific heat of aluminum is 0.897 J/g·°C and the specific heat of water is 4.18 J/g·°C.  If a…

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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.