Question

One calorie is defined as the heat required to raise the temperature of $1gm$ of water by $1^{o}C$ in a certain pressure. The pressure is

• A. $76mmofHg$
  
• B. $760cmofHg$
  
• C. $760mmofHg$
  
• D. $7.6mofHg$
  

Answer 1

The correct option is C $760mmofHg$

By definition, one calorie is defined as the heat required to raise the temperature of 1 gm of water by $1^{o}C$ at $1$ atm.

Thus the pressure $=1$ atm $=760$ mm of Hg