Asilver block, initially at 58.4∘c, is submerged into 100.0 g of water at 25.0∘c in an insulated container. the final temperature of the mixture upon reaching thermal equilibrium is 26.7∘c. the specific heat capacities for water and silver are cs, water=4.18j/(g⋅∘c) and cs, silver=0.235j/(g⋅∘c).

The mass of the silver block is 95.52 grams.

Explanation:

Heat lost by silver will be equal to heat gained by the water

Mass of silver=

Specific heat capacity of silver =

Initial temperature of the silver =

Final temperature of a silver = =

Mass of water=

Specific heat capacity of water=

Initial temperature of the water =

Final temperature of water =

On substituting all values:

we get,

The mass of the silver block is 95.52 grams.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.