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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

How much energy as heat is required to raise the temperature of 50.00 mL of water from 25.52 °C to 28.75 °C? (Density of water at this temperature = 0.997 g/mL.)

Interpretation Introduction

Interpretation:

Energy required to raise the temperature of water at definite volume at different temperature has to be determined.

Concept Introduction:

Heat energy required to raise the temperature of 1g of substance by 1k.Energy gained or lost can be calculated using the below equation.

  q=C×m×ΔT

Where,

  q= energy gained or lost for a given mass of substance (m),

  C =specific heat capacity

  ΔT= change in temperature

Explanation

Volume of water is 50mL

Density of water is 0.997g/ml

Calculate the mass of water by using, mass= volume × density.

  Mass of water = 50mL×0.997g/mL=49.85g

Calculate the ΔT using, ΔT =Tinitial

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