Heat

Question 1 of 10

A gas at 2 atm and 300 K is compressed to half its volume while its temperature rises to 450 K. Its new pressure is

Question 2 of 10

Heat travels from the sun to the earth by

Question 3 of 10

A balloon of volume 2 L at 27 °C is heated to 177 °C at constant pressure. The new volume is

Question 4 of 10

A gas at 27 °C and 100 kPa is heated at constant volume to 127 °C. Its new pressure is

Question 5 of 10

A vacuum flask reduces heat loss by conduction and convection mainly through its

Question 6 of 10

Evaporation differs from boiling because evaporation

Question 7 of 10

The temperature 27 °C on the Kelvin scale is

Question 8 of 10

An electric heater of 500 W warms 2 kg of oil by 25 K in 3 minutes. The specific heat capacity of oil is

Question 9 of 10

A 0.5 kg copper block at 100 °C is dropped into 0.2 kg of water at 20 °C. Ignoring losses, the final temperature is about (c(Cu) = 400, c(water) = 4,200 J/kg K)

Question 10 of 10

A 2 kW kettle heats 1 kg of water from 20 °C to 100 °C. Ignoring losses, the time taken is (c = 4,200 J/kg K)