OA https://utica.schoology.com/assignment/3408519448/assessment23Question 3Is the following equation endothermic or exothermic?N2 (g) + 0, (g) + 180KJ --> 2 NO (g)O aexothermicO bendothermicQuestion 4Given the following scenerio, which of the statements below is true?A beaker of water is at 50°C. The surrounding air is 21.7°C. After several minutes, the beaker of water is now at 42°C and the surrounding air is at24.3°C.The thermal energy is being transfered from the water to the air making the air warmer.aThe thermal energy is being transfered from the air to the water making the water warmer.The thermal energy is being transfered from the water to the air making the air cooler.Question 5An example of an exothermic reaction is:O aactivating an instant cold pack.refining aluminum ore.heating "meals-ready-to-eat" (MRES) by pouring water into the ration heater.HKTime left for thiassessment50:16RepIcee to search

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Question 3 Is the following equation endothermic or exothermic? N2 (g) + 02 (g) + 180KJ --> 2 NO (g) Oa exothermic O b endothermic

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.101PAE

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Concept explainers

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.

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