Heat RT MCAT

If the temperature of a patient is 40^oC, his temperature on the Fahrenheit scale will be

• 72^oC

• 96^oF

• 100^oF

• 104^oF

Device used to measure very high temperature is

• Pyrometer

• Thermometer

• Barometer

• Calorimeter

The speediest mode of heat transfer is

• Conduction

• Convection

• Radiation

• Combustion

The equation of state corresponding to 8 gm of O₂ is

• PV = 8RT

• PV = RT

• $PV=RT/2$

• $PV=RT/4$

A liter of an ideal gas at 27^oC is heated at constant pressure to 297^oC. what is the approximate final volume?

• 1.9 liters

• 1.2 liters

• 19 liters

• 0.19 liters

If K is the Boltzmann constant, the average KE of a gas molecule at absolute temperature T is

• $KT/2$

• $3KT/4$

• $KT$

• $3KT/2$

E₀ and E_h respectively represent the average kinetic energy of a molecule of oxygen and hydrogen. If the two gases are at same temperature, which of the following statements is true?

• $E0=Eh\$

• $E0>Eh$

• E0< Eh

• Nothing can be said about the magnitude of E0 and Eh as the information given its sufficient.

The temperature of a gas is raised from 27^oC to 927^oC. The root mean square speed of its molecules

• $Becomes√(927/27)timestheearliervalue$

• Remains the same

• Get halved

• Gets doubled

The temperature of an ideal gas is decreased from 120 K to 30 K. If at 120 K the root mean square velocity of the gas molecules is V, at 30 K it becomes

• 4V

• 2V

• V/4

• V/2

The heat capacity of a body depends on

• The heat given

• The mass of the body

• The material of the body

• B and C both