Pls help Gold has a specific heat of 0.129 J/(g . C°). How much energy does a 0.700 gram piece of gold give off as it's temperature cools from 53.0°C to 22.0°C?

2.8J

Explanation:

Given parameters:

Specific heat capacity  = 0.129J/g°C

Mass  = 0.7g

Initial temperature  = 53°C

Final temperature  = 22°C

Unknown:

Quantity of heat released  = ?

Solution:

To solve this problem, we use the expression below;

       H  = m c Ф

 H is the quantity of heat released

m is the mass

 c is the specific heat capacity

  Ф is the change in temperature

Now,

  Insert the given parameters and solve;

  H  = 0.7 x 0.129 x (22  - 53)  = -2.8J

The amount of heat released is 2.8J, the negative depicts the heat released.

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