
Interpretation:The energy required to heat a mug of water (250 mL) needs to be calculated in calorie and joules.
Concept introduction:
The formula to calculate energy is as follows:
Where Q is energy, s is specific heat capacity and
Formula to calculate density is as follows:

Answer to Problem 4RQ
The energy required to heat 250 mL of water is 78450 J (in Joule) and 18750 calories (in calorie).
Explanation of Solution
The volume of water is 250 mL and the density of water is
So, the mass of water is 250 g.
The specific heat capacity of water is
So, the conversion factor to convert energy from joule to calorie is
Joule and Calorie both are units of energy.
Chapter 10 Solutions
World of Chemistry
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