Chemical Engineering
0 votes
A solid sphere of radius $1$ $cm$ and initial temperature of $25^{\circ}\:C$ is exposed to a gas stream at $100^{\circ}\:C$. For the solid sphere, the density is $10^{4}$ $kg/m^{3}$ and the specific heat capacity is $500\;J/(kg\:K)$. The density of the gas is $0.6$ $kg/m^{3}$ and its specific heat capacity is $10^{3}$ $J/(kg \:K)$. The solid sphere is approximated as a lumped system (Biot number « $1$) and all specific heats are constant. If the heat transfer coefficient between the solid and gas is $50$ $W/(m^{2} \: K)$, the time (in seconds) needed for the sphere to reach $95^{\circ}\:C$ is ______________ (rounded off to the nearest integer)
in Others by (3.2k points)
retagged by

Please log in or register to answer this question.

Answer:
Quick search syntax
tags tag:apple
author user:martin
title title:apple
content content:apple
exclude -tag:apple
force match +apple
views views:100
score score:10
answers answers:2
is accepted isaccepted:true
is closed isclosed:true
Welcome to GATE Chemical Q&A, where you can ask questions and receive answers from other members of the community.
650 questions
12 answers
0 comments
3,085 users