Chemistry, 05.02.2023 09:40 geraldmorgan5580

How many kilojoules of heat are absorbed when 950 mL of water is heated from 27 degrees Celsius to 79 degrees Celsius? The specific heat of water is 4.18 J/g-C. Answer choices: 104 kJ 12 kJ 120 kJ 206 kJ

Answers

Answer from: jacquelineS7691

Answer

The kilojoules of heat absorbed = 206 kJ

Explanation

Given:

Volume of water = 950 mL

Initial temperature, T₁ = 27 ⁰C

Final temperature, T₂ = 79 ⁰C

Specific heat of water, c = 4.18 J/g ⁰C

What to find:

The kilojoules of heat absorbed.

Step-by-step solution:

Since density of water = 1 g/mL

Then the mass, m of water can be calculated first.

Density = Mass/Volume

⇒ Mass, m = Density x Volume = 1 g/mL x 950 mL = 950 g

Also, ΔT = T₂ - T₁ = 79 ⁰C - 27 ⁰C = 52 ⁰C

Therefore the kilojoules of heat absorbed, Q can be calculated using the formula given below

$\begin{gathered} Q=mc\Delta T \\ \\ Q=950g\times4.18J\text{/}g^0C\times52^0C \\ \\ Q=206,492\text{ }J=206\text{ }kJ \end{gathered}$

Therefore, the kilojoules of heat absorbed is 206 kJ

Answer from: Quest

Happy new years every one

Answer from: Quest

Change in speed or direction : )

Other questions on the subject: Chemistry

Chemistry, 22.06.2019 04:30, rosetoheart2

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

Answers: 1

continue

Chemistry, 22.06.2019 05:30, greekfreekisdbz

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

Answers: 3

continue

Chemistry, 22.06.2019 15:30, LJOrozco

Which statement names the physical property of wood a. wood is softer than coal b. wood does not rust c. wood can rot d. wood can burn

Answers: 1

continue

Chemistry, 22.06.2019 17:10, hahahwha

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

Answers: 2

continue

You know the right answer?

How many kilojoules of heat are absorbed when 950 mL of water is heated from 27 degrees Celsius to 7...