A100.0g sample of lead is heated to 100.0 oc (celsius) and is placed in a coffee cup calorimeter containing 150. g of water at 25.0 oc. after the metal cools, the final temperature of the metal and the water is 26.4 oc. calculate the specific heat capacity of lead from these experimental data, assuming that no heat escapes to the surroundings or is transferred to the calorimeter. specific heat of water = 4.184 j/g oc atomic mass pb = 207.2 g/mol calculate your answer in j/g oc with 3 significant figures, but enter the answer without units.

Answer : The specific heat capacity of lead is,

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

where,

= specific heat of lead = ?

= specific heat of water =

= mass of lead = 100.0 g

= mass of water = 150.0 g

= final temperature =

= initial temperature of lead =

= initial temperature of water =

Now put all the given values in the above formula, we get

Therefore, the specific heat capacity of lead is,

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

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