Calculate the amount of heat (in kj) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 k to 385.0 k. the specific heat capacity of ethanol is 2.42 j/g°c. calculate the amount of heat (in kj) required to raise the temperature of a 79.0 g sample of ethanol from 298.0 k to 385.0 k. the specific heat capacity of ethanol is 2.42 j/g°c. 16.6 kj 28.4 kj 12.9 kj 73.6 kj 57.0 kj

The amount of heat required to raise the temperature of the sample from 298 to 385 Kelvin, is 16.6 kJ

Explanation:

Step 1: Given data

A 79.0 g sample of ethanol raises from 298 K to 385 K

The specific heat of ethanol is 2.42J/g°C

Step 2: Calculate the heat transfer

Q = m*Cp*ΔT

with m = the mass of the ethanol sample (in grams)

⇒ mass = 79 grams

with Cp = the specific heat capacity of ethanol (in J/g°C)

⇒ Cp = 2.42 J/g°C

with ΔT = the change of temperature (T2-T1)

⇒ ΔT = 385 K - 298K = 112 °C - 25 °C = 87

Q = 79 grams * 2.42 J/g°C * 87 = 16632.66 j = 16.6 kJ

The amount of heat required to raise the temperature of the sample from 298 to 385 Kelvin, is 16.6 kJ

i believe it is c.) 1575 j.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.