Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. the temperature of the 1st block increases by 3°c while the temperature of the 2nd increases by 8°c. if the specific heat of the 2nd block is 0.24 j/g-k, what is the specific heat of the 1st block?

0.64 J/g-K

Explanation:

Solving this question relies on the relization that both blocks receive the same amount of energy but of course their temperature cannot rise by the same amount even if you had the same mass of both because they have different specific heat capacities.

amount of energy received by block 1 = amount of energy received by block 2

specific heat of block 1 * ΔT of block 1 = specific of  block 2 * ΔT of block 2

C * 3 = 0.24 * 8

C = 0.64 J/g-K

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.