# How much energy (kW) must be transferred to the ethane to heat it from 16 C to 93 C?

Saturated steam at a gauge pressure of 2.0 bar is to be used to heat a stream of ethane. The ethane enters a heat exchanger at 16 C and 1.5 bar gauge at a rate of 795 m^3 /min and is heated at constant pressure to 93 C. The steam condenses and leaves the exchanger as a liquid at 27 C. The specific enthalpy of ethane at the given pressure is 941 kJ/kg at 16 C and 1073 kJ/kg at 93 C.   a) How much energy (kW) must be transferred to the ethane to heat it from 16 C to 93 C?   b) Assuming that the energy transferred from the steam goes to heat the ethane, at what rate in m^3 /s must steam be supplied to the exchanger?
I know the answers are a) Q = 5.47×10^3 kW (b) V= 1.27 m^3/s but I don't know how to get those answers. Please use the energy balance equation for an open system:

#### Found something interesting ?

##### We don't just promise. Here is what we guarantee!

• On-time delivery guarantee
• PhD-level professional writers
• Free Plagiarism Report

• 100% money-back guarantee
• Absolute Privacy & Confidentiality
• High Quality custom-written papers

## Related Model Questions

Feel free to peruse our college and university model questions. If any our our assignment tasks interests you, click to place your order. Every paper is written by our professional essay writers from scratch to avoid plagiarism. We guarantee highest quality of work besides delivering your paper on time.