Chapter 5, Problem 8PS

### Chemistry & Chemical Reactivity

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

Chapter
Section

### 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 50â€‰mL

Density of water is 0.997â€‰g/ml

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

â€‚Â Mass of water = 50mLÃ—0.997g/mL=49.85g

Calculate the Î”T using, Î”T =Tinitial

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