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Get Full Access to Chemistry: The Central Science - 12 Edition - Chapter 5 - Problem 27e
Get Full Access to Chemistry: The Central Science - 12 Edition - Chapter 5 - Problem 27e

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# Calculate and determine whether the process is endothermic

ISBN: 9780321696724 27

## Solution for problem 27E Chapter 5

Chemistry: The Central Science | 12th Edition

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Problem 27E

Calculate $$\Delta E$$ and determine whether the process is endothermic or exothermic for the following cases: (a) $$q=0.763 \ kJ$$ and $$w=-840 \ J$$; (b) a system releases $$66.1 \ kJ$$ of heat to its surroundings while the surroundings do $$44.0 \ kJ$$ of work on the system; (c) the system absorbs $$7.25 \ kJ$$ of heat from the surroundings while its volume remains constant (assume that only $$P-V$$ work can be done).

Equation Transcription:

Text Transcription:

Delta E

q = 0.763 kJ

w = -840 J

66.1 kJ

44.0 kJ

7.25 kJ

P-V

Step-by-Step Solution:
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Heart: ● Overview of the Cardiovascular System ○ The heart propels blood to and from most body tissues via two basic types of blood vessels calle​ rteries ​and ​veins. ○ Arteries are blood vessels that carry ​ ​ way to the heart. ○ Veins are blood vessels that carry ​ d​ ack to the heart. ○ The arteries and veins entering and leaving the heart are called ​great vessels. ● General Characteristics and Functions of the Heart ○ Blood flow through the heart is ​unidirectional ​because of four heart valves. ○ The heart is functionally two side-by-side pumps that work at the same rate and pump the same volume of blood. ■ One pump directs blood to the lungs. ■ One pump directs blood to most body tissues. ○ The heart generates​ lood pressure​ through alternate cycles of the heart wall’s contraction and relaxation. ○ Blood pressure is the force of the blood pushing against the inside walls of blood vessels. ○ A minimum blood pressure is essential to circulate blood throughout the body. ● Pulmonary and Systemic Circulations ○ The cardiovascular system consists of two circulations: ■ Pulmonary- r​ ight side of the heart and the pulmonary arteries and veins; right ventricle blood is conveyed to the lungs and back to the left atrium of the heart ■ Systemic-​ from the left ventricle

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