A scalpel made of surgical stainless steel is sterilized by heating in a flame and then quenching in 175 g of ethyl alcohol. The

alcohol is initially room temperature, 23.7°C, warms to 38.6°C. The specific heat capacity of ethyl alcohol is 2.4 J / (g'K) Assuming

there is no heat lost to the surroundings, calculate the heat released by the alcohol.

-6300 J

-3600 J

6200 J

7800 J

Question

Riley Clarke

Chemistry

9 February, 03:36

A scalpel made of surgical stainless steel is sterilized by heating in a flame and then quenching in 175 g of ethyl alcohol. The

alcohol is initially room temperature, 23.7°C, warms to 38.6°C. The specific heat capacity of ethyl alcohol is 2.4 J / (g'K) Assuming

there is no heat lost to the surroundings, calculate the heat released by the alcohol.

-6300 J

-3600 J

6200 J

7800 J

+1

Answers (1)

Know the Answer?

Karlie · Answer 1

-6300J

Explanation:

The quantity of heat required to raise the temperature of a substance per unit of mass could be written as:

Q = - m*C*ΔT

Where Q is heat, m is mass of substance, C is specific capacity and ΔT is change in temperature.

Replacing:

Q = - 175g * 2.4J/gK * (38.6°C-23.7°C)

Q = - 6258J ≡ - 6300J