Heat absorbed by a mass of 1 g of helium, when its temperature rises from $ 11{}^\circ C $ to $ 131{}^\circ C $ at constant volume, is H. Heat absorbed by 7 g of nitrogen, when its temperature rises from $ 11{}^\circ C $ to $ 71{}^\circ C $ at constant volume, is $ {{H}_{N}} $ . The ratio of H to $ {{H}_{N}} $ is