7. A 28.4 g sample of aluminum is heated to 39.4 °C, then is placed in a calorimeter

containing 50.0 g of water. Temperature of water increases from 21.00 °C to

23.00 °C. What is the specific heat of aluminum?

The specific heat of aluminum is 0.214 calorie /gram °C

Explanation:

Specific heat:The heat requires to increase 1°C temperature of that object per unit gram.

When the aluminum comes in contact of of water then

The heat lose by aluminum = The heat gain by the water.

Q₁=Q₂

Where,

Q = m ×s× ΔT

m= mass of an object

s= specific heat of the object

ΔT= change of temperature.

The mass of aluminum(m₁)= 28.4 gram,  

ΔT for aluminum=(initial temperature - final temperature)= (39.4-23)°C=16.4°C

s₁=?

The mass of water(m₂) = 50 gram

ΔT for water =( final temperature-initial temperature)=(23-21)°C= 2°C

S₂=1 calorie /gram °C

Q₁=Q₂

⇒m₁s₁ΔT=m₂s₂ΔT

⇒(28.4×s₁×16.4)= 50×1×2

calorie /gram °C

The specific heat of aluminum is 0.214 calorie /gram °C

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )