Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
0 votes

How many calories are required to heat 40 grams of argon from $40-100^\circ C$ at constant volume? (R = 2 cal/mol K)

(a) 120
(b) 2400
(c) 1200
(d) 180

Can you answer this question?

1 Answer

0 votes
Answer: 180
For a monoatomic gas like argon, $C_V$ = 3 cal/mol, $C_P$ = 5 cal/mol.
Molar heat capacity is the heat required to reaise the temperature of 1 mol of the gas by $1^\circ$.
40 g of argon = 1 mole. Hence, heat required to raise the temperature from $40^\circ$ to $100^\circ C$ at constant volume = $3 \times (100-40)$ = 180 cal
answered Feb 27, 2014 by mosymeow_1

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App