A 0.305 mol0.305 mol sample of N2(g),N2(g), initially at 298 K298 K and 1.00 atm,1.00 atm, is held at constant pressure while enough heat is applied to raise the temperature of the gas by 11.1 K.11.1 K. Calculate the amount of heat ?q required to bring about this temperature change, and find the corresponding total change in the internal energy Δ?ΔU of the gas. Assume that the constant‑pressure molar specific heat for N2(g),N2(g), which consists of linear molecules, is equal to 7?/2,7R/2, where ?=8.3145 J/(mol·K)R=8.3145 J/(mol·K) is the ideal gas constant. ?=? Δ?= ?
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.
A 0.305 mol0.305 mol sample of N2(g),N2(g), initially at 298 K298 K and 1.00 atm,1.00 atm, is held at constant pressure while enough heat is applied to raise the temperature of the gas by 11.1 K.11.1 K. Calculate the amount of heat ?q required to bring about this temperature change, and find the corresponding total change in the internal energy Δ?ΔU of the gas.
Assume that the constant‑pressure molar specific heat for N2(g),N2(g), which consists of linear molecules, is equal to 7?/2,7R/2, where ?=8.3145 J/(mol·K)R=8.3145 J/(mol·K) is the ideal gas constant.
?=?
Δ?= ?
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