Question

Equal amount of heat energy are transferred into equal mass of alcohol and water sample. The rise in temperature of water sample is 25${}^0$. The temperature rise of ethyl alcohol will be. (Specific heat of ethyl alcohol is one half of the specific heat of water ).

• A. 12.5${}^0$.C
• B. 25${}^0$C
• C. 52${}^0$C
• D. It depend on the rate of energy transfer.

Answer 1

The correct option is A 12.5${}^0$.C

Concept: To increase the $1^{o}C$ of temperature we have to given the temp. to the substance equals to the specific heat of the material

Given:

According to question

$\therefore$ specific heat of ethyl alcohol is one half of the specific heat of water

means, specific heat of ethyl alcohol $=\frac{1}{2}\times$ specific heat of water

means temperature rise in ethyl alcohol$=\frac{1}{2}\times$ Temperature rise in water

$=\frac{1}{2}\times {25}^{o}C$

Temperature rise in ethyl alcohol $={12.5}^{o}C$