Question 1 (a) What is work of gas? A sample of an ideal gas at 15.0 atm and 10.0 L is allowed to expand against a constant external pressure of 2.00 atm at a constant temperature. Calculate the work in units of kJ for the gas expansion. (Hint: Boyle's law applies.)

Q: Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 36…

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Q: The specific heat capacity of lead at 25°C is 1.290×10-1 J/g/K. Answer the following: (a) For a…

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Q: A sample of gas is placed into an enclosed cylinder and fitted with a movable piston. Calculate the…

A: Work done by the gas is given by W = -P × ∆V W = - P × (V2 - V1) W = work done P = external pressure…

Q: A piston performs work of 217 L atm on the surroundings, while the cylinder in which it p,aces…

A: Record the given data,   Work done w = 217 L atm   Piston expands from 8L to 24 L.

Q: An automobile engine provides 541 Joules of work to push the pistons and generates 2137 Joules of…

A: According to first law of thermodynamics E = W + Q Where E = change in internal energy W = work Q =…

Q: A sample of hydrogen gas is kept in a container with a piston. Recall that 1 L atm = 101.3 J. If the…

A: Given data :  Volume (V1) = 1.0 L  Volume ( V2) = 4.5 L  To calculate : work done Against a vacuum…

Q: which of the following signs on q and w represent a system that is having work done on it by the…

A: • Sign Convention for Work, w i) w is positive, when work is done on the system by the surroundings…

Q: A piston has an external pressure of 8.00 atmatm. How much work has been done in joules if the…

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Q: How much work is done when a piston is compressed from 9.51 L to 4.34 L under constant atmospheric…

A: Given  A piston is compressed from 9.51 L to 4.34 L  so  V1 = 9.51 L V2 = 4.34 L piston compressed…

Q: ermined that 52.4 kJ of work is done by the mixture during the reaction.  What is the correct change…

A: According to first law of thermodynamics, the total energy of system is conserved.∆U=q+w∆U=change in…

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: A mixture of krypton and oxygen gas is expanded from a volume of 31.0L to a volume of 87.0L, while…

A: Work done = P(V2-V1)  where P = pressure , V2 = final volume , V1= initial volume

Q: A mixture of helium and neon gas is expanded from a volume of 87.0L to a volume of 96.0L, while the…

A: Work done = pressure x change in volume

Q: How much work in k3 is done when an 144.22 L piston is compressed to 61.47 L against an external…

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Q: What is the work performed when a gas expands from 0.66 L to 2.33 L against an external pressure of…

A: We have been given initial volume, final volume and external pressure We have been asked the work…

Q: During a certain chemical reaction 105 J of heat is absorbed by the system and 310 J of work is done…

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Q: Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 35…

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Q: resulting

A: ∆U = q + w  Where : ∆U = change internal energy = +166kJ  Heat(q) = +762 kJ ( positive value because…

Q: An expanding gas does 171 J of work on its surroundings at a constant pressure of 1.02 atm. If the…

A: Applying formula  w = -pΔV where w = work done on its surrounding  p= pressure , ΔV = change in…

Q: A mixture of xenon and neon gas is compressed from a volume of 92.0 L to a volume of 27.0 L, while…

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Q: A sample of gas occupies a volume of 60.6 mL60.6 mL. As it expands, it does 134.1 J134.1 J of work…

A: The volume is the space occupied by the surface.

Q: A sample of helium behaves as an ideal gas as it is heated at constant pressure from 273 K to 356 K.…

A: Given- Gas behaves as an ideal gas  Initial temperature =273K Final temperature =356K Change in…

Q: what is the final volume of a balloon in which the change in internal energy increased by 50.0J, the…

A: The objective of this question is to find the final volume of a balloon given the change in internal…

Q: Calculate the work (in J) associated with the expansion of a gas from 14.8 L to 44.3 L at a constant…

A: Given data :  Initial volume, V1 = 14.8 L  Final volume, V2 = 44.3 L  External Pressure, Pext = 3.52…

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.