Questions
What amount of heat is needed to raise the temperature of of nitrogen at room temperature to raise it’s temperature by 45° C at constant pressure?(given molecular mass=28 and R=8.3 J ; )
detailed solution
Correct option is C
number of molesn=mM=2028=0.174where m is mass of gas in gram=0.02kg=0.02x1000g=20gM is molecular weight of gas molar specific heat of gas at constant pressure is Cp Cp=7R/2=72×8.3 J mole-1 K−1 amount of heat required to raise temperature of gas at constant pressure is Q Q=nCp×ΔT here ΔT is raise in temperature substitute the values of n,Cp,ΔT Q=0.714×72×8.3 ×45 J ⇒Q=933.75JSimilar Questions
Statement 1: It is necessary to define two molar heat capacities for a gas
Statement 2: Work is done by a gas when it volume changes.
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