Question

How much heat is required to change temperature of 10g of water from 4°C to 8°C? (Water has a specific heat of 4.18 )?

Answer 1

Answer:

Since there's no phase change involved in those temperatures, the amount of heat *in calories* is:

10 g H2O x 4°C = 40 calories.

The number of *joules* is the number of calories x 4.18

40 cal. x 4.18 j/cal = 167.2 j

Explanation:

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Answer 2

The 167.2 Joules heat is required.

Given - Mass, temperature, specific heat

Find - Heat

Solution - The formula to be used is - Heat = mass*specific heat capacity*change in temperature

Heat = 10*4.18*(8-4)

Performing subtraction in bracket and performing multiplication

Heat = 167.2 Joules

Hence, the heat required is 167.2 Joules.

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