5. A 28.4 g sample of aluminum is heated to 39.4 °C, and placed in a calorimeter containing 50.0 g of water. The
temperature of water increases from 21.00 °C to 23.00 °C. What is the specific heat capacity, C, of aluminum?

C Al = 0.8975 J/g.K

Explanation:

∴ m Al = 28.4 g

∴ T Al = 39.4°C = 312.4 K

∴ m H2O = 50.0 g

∴ T1 H2O = 21°C = 294 K

∴ T2 H2O = 23°C = 296 K

∴ C H2O = 4,18 J/g.K

⇒ C Al = ?

in a calorimeter:

∴ Al give heat: Q Al < 0

∴ H2O revceives heat: Q H2O > 0

⇒ - Q Al = Q H2O

⇒ - (28.4 g)*(C Al)*(296 K - 312.4 K) = (50.0 g)*(4.18 J/g.K)*(296 K - 294 K)

⇒ - (- 465.76 g.K)*(C Al) = 418 J

⇒ C Al = (418 J) / (465.76 g.K)

⇒ C Al = 0.8975 J/g.K = 897.5 J/Kg.K

chemistry sucks a**

explanation:

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.