A Thomas flowmeter is a device in which heat is transferred at a measured rate from an electric coil to a flowing fluid, and the flow rate of the stream is calculated from the measured increase of the fluid temperature. Suppose a device of this sort is inserted in a stream of nitrogen, the current through the heating coil is adjusted until the wattmeter reads 1.25 kW, and the stream temperature goes from 32.5°C and 110 kPa before the heater to 40.0°C and 110 kPa after the heater. If the specific enthalpy of nitrogen is given by the formula i(wrne) = 104(7(*c) - 250) = 1.04 what is the volumetric flow rate of the gas (L/s) upstream of the heater (i.e. at 32.5°C and 110 kPa)?
A Thomas flowmeter is a device in which heat is transferred at a measured rate from an electric coil to a flowing fluid, and the flow rate of the stream is calculated from the measured increase of the fluid temperature. Suppose a device of this sort is inserted in a stream of nitrogen, the current through the heating coil is adjusted until the wattmeter reads 1.25 kW, and the stream temperature goes from 32.5°C and 110 kPa before the heater to 40.0°C and 110 kPa after the heater. If the specific enthalpy of nitrogen is given by the formula i(wrne) = 104(7(*c) - 250) = 1.04 what is the volumetric flow rate of the gas (L/s) upstream of the heater (i.e. at 32.5°C and 110 kPa)?
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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**A Thomas flowmeter** is a device in which heat is transferred at a measured rate from an electric coil to a flowing fluid, and the flow rate of the stream is calculated from the measured increase of the fluid temperature. Suppose a device of this sort is inserted in a stream of nitrogen, the current through the heating coil is adjusted until the wattmeter reads 1.25 kW, and the stream temperature goes from 32.5°C and 110 kPa before the heater to 40.0°C and 110 kPa after the heater.
If the specific enthalpy of nitrogen is given by the formula:
\[
\hat{H}\left(\frac{\text{kJ}}{\text{kg}}\right) = 1.04\left(T(°C) - 25.0\right)
\]
What is the volumetric flow rate of the gas (L/s) upstream of the heater (i.e., at 32.5°C and 110 kPa)?
---
**Options**:
- Input box for flow rate with unit L/s.
**Assistance Used**
- *Hint*: Divide the energy input by the enthalpy change.
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**Attempts: 2 of 3 used**
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Transcribed Image Text:**Question 2 of 2**
**Current Attempt in Progress**
**A Thomas flowmeter** is a device in which heat is transferred at a measured rate from an electric coil to a flowing fluid, and the flow rate of the stream is calculated from the measured increase of the fluid temperature. Suppose a device of this sort is inserted in a stream of nitrogen, the current through the heating coil is adjusted until the wattmeter reads 1.25 kW, and the stream temperature goes from 32.5°C and 110 kPa before the heater to 40.0°C and 110 kPa after the heater.
If the specific enthalpy of nitrogen is given by the formula:
\[
\hat{H}\left(\frac{\text{kJ}}{\text{kg}}\right) = 1.04\left(T(°C) - 25.0\right)
\]
What is the volumetric flow rate of the gas (L/s) upstream of the heater (i.e., at 32.5°C and 110 kPa)?
---
**Options**:
- Input box for flow rate with unit L/s.
**Assistance Used**
- *Hint*: Divide the energy input by the enthalpy change.
**eTextbook and Media**
- Option to access additional resources.
**Save for Later**
- Option to save the progress.
**Attempts: 2 of 3 used**
**Submit Answer**
(Note: The page also includes navigation options and general layout hints for interacting with the online platform.)
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