Question

one end of a 0.25m long metal bar is in steam and other is in contact with ice. If 2g of ice melts per minute, then the thermal conductivity of the metal if area of cross section is 5×10*-4​

Answer 1

Answer:

k=2.24

Explanation:

P= (change in temperature)*(k)*  ( area of cross-section)/length

dQ/dt = 100*k*(5*10^-4)/0.25

dm L/1 sec =5k*10^-2 /0.25

2*80/60 = 5k*10^-2/0.25

there is a unit difference between right and left side, left side is in calories and right side is in joules. We know, 1 cal= 4.2 J thus,

k=2.24