Question

the specific heat of copper is 0.09/cal g°c. how heat will be required to increase the temperature of a piece of copper weighing 70g by 20°c?​

Answer 1

Answer:

he correct answer is:  0.9 cal  

Explanation:

The formula for the specific heat (s) is:

s = (q)/(m * ΔT) --- (1)

Where

s = Specific heat = 0.09 cal/g°C

m = mass (make sure it is in GRAMS) = 70g

ΔT = Change in temperature = 21° - 20° = 1°

q = Heat Energy = ?

Plug in the values in the Equation (1):

(1) => q = (70*1*0.09) = 6.3 cal

Explanation:

Specific heat of copper = 0.09 calorie/gram °C

           Change in temperature ΔT = 20°C

           Weight of copper = 70gram

To find: Heat required to increase the temperature

Solution: Specific heat capacity is the amount of heat required to change the temperature of a substance by one degree of a unit mass of the substance.

The heat energy required to change the temperature of a substance is the product of the mass of a substance, specific heat capacity, and change in temperature. It is represented by -

ΔH = mcΔT

Where m is the substance, c is the specific heat, and ΔT is the change of temperature.

ΔH = 70×0.09×20

     = 126 calorie

Therefore, the heat required to change the temperature b 20°C is 126 Calories.