Substance Specific Heat Capacity
0.290 J/g • °C
Sand
Aluminum
0.902 J/g • °C
Iron
Silver
0.444 J/g • °C
0.240 J/g • °C
0.129 J/g • °C
Gold
1. If 750 g of iron absorbs 22,000 joules, what will the change in temperature be?

ΔT = 66.06°C

Explanation:

Given data:

Mass of iron = 750 g

Heat absorbed = 22000 j

Change in temperature = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

specific heat capacity of iron is 0.444 J/g.°C

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

By putting values,

22000 j = 750 g × 0.444 J/g.°C × ΔT

22000 j = 333 J/°C × ΔT

ΔT = 22000 j  /333 J/°C

ΔT = 66.06°C

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."