Chapter 3, Evaluating Properties Video Solutions, Fundamentals of Engineering Thermodynamics SI VERSION

01:27

Problem 1

Why does food cook more quickly in a pressure cooker than in water boiling in an open container?

Vysakh M

Numerade Educator

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Problem 2

If water contracted on freezing, what implications might this have for aquatic life?

Ankur S

Numerade Educator

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Problem 3

Why do frozen water pipes tend to burst?

Ankur S

Numerade Educator

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Problem 4

Referring to a phase diagram, explain why a film of liquid water forms under the blade of an ice skate.

Rashmi Sinha

Numerade Educator

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Problem 5

Can water at $-40^{\circ} \mathrm{C}$ exist as a vapor? As a liquid?

Ankur S

Numerade Educator

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Problem 6

What would be the general appearance of constant-volume lines in the vapor and liquid regions of the phase diagram?

Rashmi Sinha

Numerade Educator

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Problem 7

Are the pressures listed in the tables in the Appendix absolute pressures or gage pressures?

Rashmi Sinha

Numerade Educator

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The specific internal energy is arbitrarily set to zero in Table A-2 for saturated liquid water at $0.01^{\circ} \mathrm{C}$. If the reference value for $u$ at this reference state were specified differently, would there be any significant effect on thermodynamic analyses using $u$ and $h$ ?

Rashmi Sinha

Numerade Educator

03:10

Problem 9

For liquid water at $20^{\circ} \mathrm{C}$ and $1.0 \mathrm{MPa}$, what percent difference would there be if its specific enthalpy were evaluated using Eq. $3.14$ instead of Eq. $3.13 ?$

Susan Hallstrom

Numerade Educator

05:42

Problem 10

For a system consisting of $1 \mathrm{~kg}$ of a two-phase, liquid-vapor mixture in equilibrium at a known temperature $T$ and specific volume $v$, can the mass, in $\mathrm{kg}$, of each phase be determined? Repeat for a three-phase, solid-liquid-vapor mixture in equilibrium at $T, v_{-}$

Susan Hallstrom

Numerade Educator

13:33

Problem 11

By inspection of Fig. $3.9$, what are the values of $c_{p}$ for water at $500^{\circ} \mathrm{C}$ and pressures equal to $40 \mathrm{MPa}, 20 \mathrm{MPa}, 10 \mathrm{MPa}$, tand $1 \mathrm{MPa}$ ? Is the ideal gas model appropriate at any of these states?

Susan Hallstrom

Numerade Educator

04:23

Problem 12

. Devise a simple experiment to determine the specific heat, $c_{p}$, of liquid water at atmospheric pressure and room temperature.

Susan Hallstrom

Numerade Educator

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Problem 13

. If a block of aluminum and a block of steel having equal volumes each received the same energy input by heat transfer, which block would experience the greater temperature increase?

Ankur S

Numerade Educator

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Problem 14

. Under what circumstances is the following statement correct? Equal molar amounts of two different gases at the same temperature, placed in containers of equal volume, have the same pressure.

Ankur S

Numerade Educator

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