12-05-2020
Chemistry

contestada

How much heat is required to change the temperature of two cups of water (500 g) from room temperature (25◦C) to boiling? Specific heat of water is c=4.184 J/(g oC) a 78.5 kJ b 15.7 kJ c 157 kJ d 1.57 kJ

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valeherrera333 valeherrera333

19-05-2020

Answer:

c. 157 KJ

Explanation:

Q= mC dT dT= 100°C(boiling point) - 25°C=75°C

Q= (500 g * 4.184 J/g °C * 75 °C)

Q= 156900 J= 157 KJ

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