The activation energy for the diffusion process and state needs to be determined. Whether bonding rate can be controlled by gold diffusion or silver diffusion needs to be explained. Concept introduction: The chemical reaction rate can be calculated by Arrhenius equation from which we can calculate activation energy as follows: Rate = C 0 exp ( − Q R T ) Here, Co = constant Q = activation energy R = gas constant T = temperature

Question

Water is the working fluid in an ideal Rankine cycle. Saturated vapor enters the turbine at 12 MPa, and the condenser pressure is 8 kPa. The mass flow rate of steam entering the turbine is 50 kg/s. Determine: (a) the net power developed, in kW. (b) the rate of heat transfer to the steam passing through the boiler, in kW. (c) the percent thermal efficiency. (d) the mass flow rate of condenser cooling water, in kg/s, if the cooling water undergoes a temperature increase of 18°C with negligible pressure change in passing through the condenser.

Answer 1

Question

Chapter 5, Problem 5.80P

Interpretation Introduction

Interpretation:

The activation energy for the diffusion process and state needs to be determined. Whether bonding rate can be controlled by gold diffusion or silver diffusion needs to be explained.

Concept introduction:

The chemical reaction rate can be calculated by Arrhenius equation from which we can calculate activation energy as follows:

Rate = C0exp(−QRT)

Here,

Co = constant

Q = activation energy

R = gas constant

T = temperature

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