Interpretation: The positive and negative sign of the energy needs to be explained.

Concept Introduction: In an exothermic reaction, energy discharges from the system while in endothermic reaction, energy is consumed from the surrounding. The internal energy E of a system is altered by a work flow and heat or both.

Expert Solution & Answer

Answer to Problem 15A

If the energy is denoted by a positive sign, then the process is endothermic and if energy is denoted by a negative sign, the process is exothermic.

Explanation of Solution

If a quantity of energy passes into the system via heat, q (heat), it is equal to +x. Here, increase in system’s energy is denoted by the positive sign. On the other hand, when energy flows out of the system via heat, q, it is equal to −x. The decrease in system’s energy is denoted by negative symbol.

Conclusion

The ability to do work is termed as energy. Energy is conserved.

Chapter 10, Problem 14A

Chapter 10, Problem 16A

Chapter 10 Solutions

World of Chemistry, 3rd edition

Ch. 10.1 - Prob. 1RQ Ch. 10.1 - Prob. 2RQ Ch. 10.1 - Prob. 3RQ Ch. 10.1 - Prob. 4RQ Ch. 10.1 - Prob. 5RQ Ch. 10.1 - Prob. 6RQ Ch. 10.1 - Prob. 7RQ Ch. 10.2 - Prob. 1RQ Ch. 10.2 - Prob. 2RQ Ch. 10.2 - Prob. 3RQ

Ch. 10.2 - Prob. 4RQ Ch. 10.2 - Prob. 5RQ Ch. 10.2 - Prob. 6RQ Ch. 10.3 - Prob. 1RQ Ch. 10.3 - Prob. 2RQ Ch. 10.3 - Prob. 3RQ Ch. 10.3 - Prob. 4RQ Ch. 10.3 - Prob. 5RQ Ch. 10.4 - Prob. 1RQ Ch. 10.4 - Prob. 2RQ Ch. 10.4 - Prob. 3RQ Ch. 10.4 - Prob. 4RQ Ch. 10.4 - Prob. 5RQ Ch. 10.4 - Prob. 6RQ Ch. 10.4 - Prob. 7RQ Ch. 10 - Prob. 1A Ch. 10 - Prob. 2A Ch. 10 - Prob. 3A Ch. 10 - Prob. 4A Ch. 10 - Prob. 5A Ch. 10 - Prob. 6A Ch. 10 - Prob. 7A Ch. 10 - Prob. 8A Ch. 10 - Prob. 9A Ch. 10 - Prob. 10A Ch. 10 - Prob. 11A Ch. 10 - Prob. 12A Ch. 10 - Prob. 13A Ch. 10 - Prob. 14A Ch. 10 - Prob. 15A Ch. 10 - Prob. 16A Ch. 10 - Prob. 17A Ch. 10 - Prob. 18A Ch. 10 - Prob. 19A Ch. 10 - Prob. 20A Ch. 10 - Prob. 21A Ch. 10 - Prob. 22A Ch. 10 - Prob. 23A Ch. 10 - Prob. 24A Ch. 10 - Prob. 25A Ch. 10 - Prob. 26A Ch. 10 - Prob. 27A Ch. 10 - Prob. 28A Ch. 10 - Prob. 29A Ch. 10 - Prob. 30A Ch. 10 - Prob. 31A Ch. 10 - Prob. 32A Ch. 10 - Prob. 33A Ch. 10 - Prob. 34A Ch. 10 - Prob. 35A Ch. 10 - Prob. 36A Ch. 10 - Prob. 37A Ch. 10 - Prob. 38A Ch. 10 - Prob. 39A Ch. 10 - Prob. 40A Ch. 10 - Prob. 41A Ch. 10 - Prob. 42A Ch. 10 - Prob. 43A Ch. 10 - Prob. 44A Ch. 10 - Prob. 45A Ch. 10 - Prob. 46A Ch. 10 - Prob. 47A Ch. 10 - Prob. 48A Ch. 10 - Prob. 49A Ch. 10 - Prob. 50A Ch. 10 - Prob. 51A Ch. 10 - Prob. 52A Ch. 10 - Prob. 53A Ch. 10 - Prob. 54A Ch. 10 - Prob. 55A Ch. 10 - Prob. 56A Ch. 10 - Prob. 57A Ch. 10 - Prob. 58A Ch. 10 - Prob. 59A Ch. 10 - Prob. 60A Ch. 10 - Prob. 61A Ch. 10 - Prob. 62A Ch. 10 - Prob. 63A Ch. 10 - Prob. 64A Ch. 10 - Prob. 65A Ch. 10 - Prob. 66A Ch. 10 - Prob. 67A Ch. 10 - Prob. 68A Ch. 10 - Prob. 1STP Ch. 10 - Prob. 2STP Ch. 10 - Prob. 3STP Ch. 10 - Prob. 4STP Ch. 10 - Prob. 5STP Ch. 10 - Prob. 6STP Ch. 10 - Prob. 7STP Ch. 10 - Prob. 8STP Ch. 10 - Prob. 9STP Ch. 10 - Prob. 10STP Ch. 10 - Prob. 11STP

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