15.2 grams of aluminim and 15.2 grams of beryllium both start at room temp 25 degreees, if 46.4 j of heat are added to each seperatley, what are the temp differneces between the two after they have been heated? the specific heat for al equals 0.899 j/g degrees celcuis and be=1.82 j/g degrees celcius

After adding 46.4 J of heat, the final temperature of aluminium is 28.396 ( The temperature  difference is 3.396 °C).

The final temperature of berylium is 26.677 ( the temperature difference is 1.677°C)

Explanation:

Step 1: Data given

Mass of aluminium = 15.2 grams

Mass of berylium = 15.2 grams

Temperature = 25.0°C

46.4 J of heat is added

The specific heat for Al = 0.899 J/g °C

The specific heat for Be=1.82 J/g °C

Step 2: Calculate the final temperature of aluminium

Q = m*c*ΔT

⇒ Q = the heat in Joule = 46.4 J

⇒ m = the mass of Aluminium = 15.2 grams

⇒ c= the specific heat of aluminium = 0.899 J/g°C

⇒ ΔT = The change in temperature = T2 - T1 = T2 - 25.0 °C

46.4 J = 15.2g * 0.899 J/g°C * (T2-25.0 °C)

46.4 = 13.6648(T2 - 25.0°C)

46.4 = 13.6648T2 - 341.62

388.02 = 13.6648T2

T2 = 28.396 °C

Step 3: Calculate the final temperature of berylium

Q = m*c*ΔT

⇒ Q = the heat in Joule = 46.4 J

⇒ m = the mass of Aluminium = 15.2 grams

⇒ c= the specific heat of aluminium = 1.82 J/g°C

⇒ ΔT = The change in temperature = T2 - T1 = T2 - 25.0 °C

46.4 J = 15.2g * 1.82 J/g°C * (T2-25.0 °C)

46.4 = 27.664(T2 - 25.0)

46.4 = 27.664T2 - 691.6

738 = 27.664T2

T2 = 26.677 °C

After adding 46.4 J of heat, the final temperature of aluminium is 28.396 ( The temperature  difference is 3.396 °C).

The final temperature of berylium is 26.677 ( the temperature difference is 1.677°C)

i think 4.44 moles

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.