Question

Four materials have the same initial temperature and mass, if all the four materials absorbed 5000 Joules of heat which material has the highest temperature?
Glass


Copper


Lead


Gold

Answer 1

Answer:

reaches a higher temperature is LEAD.

Explanation:

In this exercise we have a calorimeter problem, in which the initial energy is absorbed by each body

       E₀ = m c_e ΔT

where E₀ = 5000 J

       ΔT = $\frac{E_o}{m \ c_e}$

the specific heats for each material are tabulated

      material   c_e (J / kg ºC)

     glass           837

     copper       387

     lead            128

     gold            129

As they indicate that the mass of the materials is the same, the one with the greatest temperature difference is the one with the least specific heat, consequently the one that reaches a higher temperature is LEAD.

let's calculate for a mass of 1 kg

glass

       ΔT = 5000/(1 837)

       ΔT = 6ºC

Lead

       ΔT = 5000/(1 128)

       ΔT = 39.1º

GOLD

       ΔT = 5000/(1 129)

       ΔT = 38.8º C