The specific heat of octane, C₈H₁₈(l), is 2.22 J•g/K. (b) Which will require more heat, increasing the temperature of 1 mol of C₈H₁₈(l), by a certain amount or increasing the temperature of 1 mol of H₂O(l) by the same amount?

Video transcript

Hi everyone here we have a question asking us to identify which between one mole of water or one mole of acetic acid will cries more heat to increase the temperature by one degree. At the specific heat of acetic acid is 2.043 jules. Programs kelvin. So first we're going to convert to moles Using the more mass, the more mass of acetic acid is 60 0.6 grams Permal. The molar mass of water is 18 .02 g per mole. And now we can convert to moles. So for acetic acid, we're going to take our heat capacity to point 043 jules, her grams times kelvin. We're going to multiply by the molar mass. So 60.6 grams per mole And that equals 0.7 jules Permal times kelvin. Next we're going to do the same for water. So its specific heat is for .184 jules per grams times killed in Are going to multiply by its molar mass, which is 18.02 grams per mole. And that equals 0.40 jules Permal times kelvin. So acetic acid Is going to require more heat to increase the temperature by 1° because it is our larger number. So our answer is acetic acid. Thank you for watching. Bye.