## Related questions with answers

The vacuum pressure of a condenser is given to be 80 kPa. If the atmospheric pressure is 98 kPa, what is the gage pressure and absolute pressure in kPa, $kN/m^2, lbf/in^2,$ psi, and mmHg.

Solution

VerifiedTo calculate the $\textbf{gauge pressure}$ $p_g$ of a condenser we need to subtract the $\textbf{vacuum pressure}$ $p_v=80 \text{ kPa}$ from the $\textbf{atmospheric pressure}$ $p_{atm}=98 \text{ kPa}$:

$\begin{align*} p_g&=p_{atm}-p_v\\ p_g&=98 \text{ kPa}- 80\text{ kPa} \\ p_g&=\boxed{\color{#c34632}18 \text{ kPa} }\\ \end{align*}$

The $\textbf{absolute pressure}$ $p$ in this problem is the same as the vacuum pressure:

$\begin{equation*} p=p_v=\boxed{\color{#c34632}80 \text{ kPa}}\\ \end{equation*}$

To express the absolute pressure $p$ and the gauge pressure $p_g$ in $\text{kNm}^{-2}$, $\text{lbfin}^{-2}$, psi and mmHg we need to do some $\textbf{unit manipulation}$.

## Create a free account to view solutions

## Create a free account to view solutions

## Recommended textbook solutions

#### Fundamentals of Thermal-Fluid Sciences

5th Edition•ISBN: 9780078027680 (5 more)John Cimbala, Robert Turner, Yunus A. Cengel#### Fundamentals of Electric Circuits

6th Edition•ISBN: 9780078028229 (2 more)Charles Alexander, Matthew Sadiku#### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

4th Edition•ISBN: 9780133942651 (8 more)Randall D. Knight#### Advanced Engineering Mathematics

10th Edition•ISBN: 9780470458365 (5 more)Erwin Kreyszig## More related questions

1/4

1/7