250g of lead at 170oC is dropped into 100g of water at 0oC. If the...

JAMB 1982

250g of lead at 170^oC is dropped into 100g of water at 0^oC. If the final temperature is 12^oC, the specific heat of lead is (specific heat of water is 4,200J/kg^oC)

A. 39.5J/kg^oC
B. 50.4J/kg^oC
C. 127.6J/kg^oC
D. 154.6J/kg^oC
E. 173.4J/kg^oC

WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

WAEC and NECO CBT Software for Computers and Laptops - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now

Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts

Correct Answer: Option C

Explanation

Heat lost = heat gained

0.25 x C₁ x (170 - 12) = 0.1 x 4200 x (12 - 0)

C₁ = 127.6J/kg^oC

Previous Next

Go back to Phy classroom

Report an Error Ask A Question Download App

Your School's Whatsapp Group - Join Us now

Contributions ({{ comment_count }})

Please wait...

{{ settings.no_comment_msg ? settings.no_comment_msg : 'There are no comments' }}

Quick Questions

If the power of a lens is +2.5D. Calculate the radius of curvature (a). 80cm (b). 40cm (c). 25cm (d).... Answer this

1 Answers · Physics · 4 days ago
Subjects to learn under petroleum engineering? Answer this

1 Answers · 4 days ago
what is the cut of mark for medical doctor in university and list all the university? Answer this

1 Answers · 2 days ago

250g of lead at 170oC is dropped into 100g of water at 0oC. If the...

Correct Answer: Option C

Explanation

Contributions ({{ comment_count }})

Please wait...

Modal title

Report

Block User

{{ feedback_modal_data.title }}

Quick Questions

Post your Contribution

Sign In