Question

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?

Answer 1

2.8J

Step-by-step 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.