Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Side of the given cubical ice box, s = 30 cm = 0.3 m
Thickness of the ice box, l = 5.0 cm = 0.05 m
Mass of ice kept in the ice box, m = 4 kg
Time gap, t = 6 h = 6 × 60 × 60 s
Outside temperature, T = 45°C
Coefficient of thermal conductivity of thermoCol, K = 0.01 J s–1 m–1 K–1
Heat of fusion of water, L = 335 × 103 J kg–1
Let m’ = total amount of ice that melts in 6 h.
The amount of heat lost by the food:
θ = (KA (T1 – T2)/t)/d
Where,
A = Surface area of the box = 6s2 = 6 × (0.3)2 = 0.54 m3
θ = (0.01 x 0.54 x (45) x 6 x 60 x 60)/ (0.05)
=104976 J
But θ = m’L
Or m’ = (θ /L)
= (104976)/ (335 x 103)
=0.313Kg
Mass of ice left = (4 – 0.313) = 3.687 kg
Hence, the amount of ice remaining after 6 h is 3.687 kg.
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !