Search found 4 matches

by 404324273
Tue Jan 13, 2015 10:29 pm
Forum: Phase Changes & Related Calculations
Topic: Hw 7.37
Replies: 2
Views: 3008

Hw 7.37

How much heat is needed to convert 80.0g of ice at 0 degrees into liquid water at 20 degrees?

So I tried using q=mCs(delta T).. i know i'm suppose to use the specific heat capacity of water and the standard enthalpy of fusion..but i'm not sure how to combine the two to solve for q?
by 404324273
Tue Jan 13, 2015 7:29 pm
Forum: Heat Capacities, Calorimeters & Calorimetry Calculations
Topic: HW 7.33
Replies: 1
Views: 714

HW 7.33

The high-temperature contribution of vibrational modes to the molar heat capacity of a solid at constant volume is R for each mode of vibrational motion. Hence, for a monatomic solid, the molar heat capacity at constant volume is approximately 3R. a) The specific heat capacity of a certain monatomic...
by 404324273
Tue Jan 13, 2015 12:14 am
Forum: Reaction Enthalpies (e.g., Using Hess’s Law, Bond Enthalpies, Standard Enthalpies of Formation)
Topic: Question 7.27, Gas constant temperature units
Replies: 9
Views: 1419

Re: Question 7.27, Gas constant temperature units

I know i'm really late to this post.. but could someone tell me where I get the constant R from?

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