Question

The specific heat capacity of liquid mercury is 0.14 J/gK.

How many joules of heat are needed to raise the temperature of 5.00 g of mercury from 15.0°C to 36.5°C?

Answer 1

Answer:

There will be 15.05 Joules of heat released.

Explanation:

Step 1: Data given

Mass of mercury = 5.00 grams

The specific heat of mercury = 0.14 J/g*K = 0.14 J/g°C

Raise of temperature from 15.0°C to 36.5 °C

Step 2: Calculate heat released

q = m*c*ΔT

⇒ with q = The heat released in Joules

⇒ with m = the mass of mercury = 5.00 grams

⇒ with c = The specific heat of mercury = 0.14 J/g°C

⇒ with ΔT = The change of temperature = T2 - T1 = 36.5°C - 15.0°C = 21.5 °C

q = 5.00g * 0.14 J/g°C * 21.5 °C = 15.05 J

There will be 15.05 Joules of heat released.

Answer 2

The quantity of heat needed to raise 5g of mercury  from 15.0°C to 36.5°C is  15.05 Joules

Specific heat Capacity

Given Data

• Specific heat capacity of liquid mercury  = 0.14 J/gK.
• Mass = 5.00 g
• T1 =  15.0°C
• T2 = 36.5°C

We know that the expression for the amount of heat is given as

Q =. mcΔT

Substituting our given data into the expression we have

Q = 5*0.14*(36.5 - 15)

Q = 0.7*21.5

Q = 15.05 Joules

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