A mixture of an ideal gas has following composition by the mass

gas

Mass %

C_p (kJ/kg.K)

C_v (kJ/kg.K)

1

50

1.2

0.9

2

30

1.5

1

3

20

1.3

1.1

Find the ratio of the specific heats (C_p/C_v) of the mixture _____ up to three decimal places.

Enter numerical value using the virtual keypad. Round off where necessary.