A piece of newly synthesized material of mass 25.0 g at 80.0C is placed in a calorimeter containing 100.0 g of water at 20.0C. If the final temperature of the system is 24.0C, what is the specific heat capacity of the material

1.2 J/g.°C or 1200 J/kg.°C

Explanation:

Heat lost by the material = heat gained by water.

CM(t₁-t₃) = cm(t₃-t₂) Equation 1

Where C = specific heat capacity of the material, M = mass of the material, c = specific heat capacity of water, m = mass of water, t₁ = initial temperature of the material, t₂ = initial temperature of water, t₃ = final temperature of the system.

make C the subject of the equation

C = cm(t₃-t₂)/M(t₁-t₃) Equation 2

Given: M = 25 g, m = 100 g, t₁ = 80 °C, t₂ = 20 °C, t₃ = 24 °C

Constant: c = 4.2 J/g.°C

Substitute into equation 2

C = 100(4.2)(24-20)/25(80-24)

C = 100(4.2)(4)/25(56)

C = 1680/1400

C =  1.2 J/g.°C or 1200 J/kg.°C

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.