The specific volume of a gas is 2 m3/Kg, at 12 Pa, H = 30 J/Kg and at 15 Pa, H = 45 J/Kg, what is the heat transferred to the system?

• A. t6 J/Kg
• B. t9 J/Kg
• C. t12 J/Kg
• D. t15 J/Kg